Python Sqlite Update

python之sqlite3使用详解,阿英的网易博客,不顾一切的去想,于是我们有了梦想。脚踏实地的去做,于是梦想成了现实。,人生一年又一年,只要每年都有所积累,有所成长,都有那么一次自己认为满意的花开时刻就好。. SQLite is a. ia32 is needed to target 32bit node-webkit builds, while x64 will target 64bit node-webkit builds (if available for your platform). headers on sqlite> SELECT. One of the main benefits of the DBConvert tool is the range of effective features that helps you to transfer all database objects together or each individually. Python SQLite Update Table data [Complete Guide] Pynative. Insert single and multiple rows into SQLite table from Python. mode column sqlite>. Summary: in this tutorial, you will learn how to use SQLite UPDATE statement to update data of existing rows in the table. SimpleSQLite is a Python library to simplify SQLite database operations: table creation, data insertion and get data as other data formats. Python sqlite update example keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. Hello, Does sqlite3 in python 2. Welcome to the project page for pyDaSSQLiteMan (Python Data and SQLite Manager). The Python standard for database interfaces is the Python DB-API, which is used by Python's database interfaces. 適合関数を書くことで好きな Python 型を SQLite に送り込めるようになりました。しかし、本当に使い物になるようにするには Python から SQLite さらに Python へという往還(roundtrip)の変換ができる必要があります。. SQL As Understood By SQLite. - Store data : SQLite. x release that will support Python 2. We will also provide the --user option. Furthermore, SQLite enforces sequential write-access to the database (one process at a time). I have a variable in side of my Event 1 component that is equal to Another variable inside of data. In general, Python users want to use psycopg2 unless they have a strong reason to try another driver, most of which are no longer maintained. The GLOB operator is used to match only text values against a pattern that you specifiy using wildcards. This means you're free to copy and share these comics (but not to sell them). See more: sqlite3 command line, python database migrations, sqlite3 python download, python sqlite update, python sqlite3 book, sqlite3 python tutorial, sqlite3 python, python sqlite yahoo finance, html python sqlite, python sqlite table xml, python sqlite xml, xml python sqlite, python sqlite application, python sqlite, python sqlite database. C# (CSharp) SQLite SQLiteConnection. Although the sign function currently does not exist in sqlite3, it is very easy to create in the "/src/func. 3 Declarative Programming. msg343531 - Author: Ma Lin (Ma Lin) * Date: 2019-05-26 04:26 @Mariatta Wijaya, would you update SQLite? I want to do it myself, by following your patch in issue28791. The SQLite UPDATE command can update more than one row, but all of the rows must be part of the same table. There is no need to install PySQLite because it comes as a standard module from Python 2. Python is a popular programming language that is reliable, flexible, easy to learn, free to use on all operating systems, and supported by both a strong developer community and many free libraries. Why we use Sqlite in C#. If you want to connect to some other database, then you’ll need to edit the connection string. Alternatively to the --upgrade we can use -U which is the short form. python \dbdecrypt. Python SQLite tutorial. November 01, 2017 15:30 / python sqlite / 0 comments. (*Note: if you are on centos 5, and do not have access to Python 2. Executing queries is very simple in MySQL Python. The ClientForm API is still available -- to switch from ClientForm to mechanize, just s/ClientForm/mechanize in your source code, and ensure any use of the module logging logger named "ClientForm" is updated to use the new logger name "mechanize. Datatypes In SQLite Version 3. This application is a Python Tkinter application designed to enable easy SQLite database file manipulation, and an easy method to run SQL styled queries on CSV files. execute('INSERT INTO colors Values ("red", "blue")') As we can see above, we want to insert 2 words and we type them as when we are typing whole the codes. The fix is easy. SQLite is a popular choice as an embedded database for local/client storage in web browsers and mobile phones. 5, make sure that you install python-sqlite2, for example from one of these rpms) rather than updating your python-sqlite in place. In this installment of the Database Clinic series—in which experts and their databases of choice are pitted against a series of the same challenges— Mark Niemann-Ross demonstrates how to leverage SQLite to solve common database problems. Create a super user. Here we will learn how to use SQLite in PYTHON programming language to create database, tables and to perform INSERT, UPDATE, DELETE and SELECT operations on SQLite database using pysqlite extension in PHP with examples. SQLite is an open source relational database included with the Python standard library as of Python 2. We will also provide the --user option. Build and debug your Python apps with Visual Studio Code, and push your apps to the cloud with a few clicks. Python gained the sqlite3 module all the way back in version 2. SQLite Features/ Why to use SQLite. While we can query the entire table, we can instead. Hi everyone, Im just learning how use the SQlite3 and everything seems pretty straight forward, but I'm having trouble getting it to SELECT from a given user input. …Creation of an SQLite database and tables is simple,…and the Python script reflects that simplicity. Once the Sqlite database is copied from mobile device to the system, below mentioned command can be used to decrypt data file. Datatypes In SQLite Version 3. The SQLite WHERE clause is used to filter the results from a SELECT, INSERT, UPDATE, or DELETE statement. Introduction to SQLite ROWID table. Python has a library to access SQLite databases, called sqlite3, intended for working with this database which has been included with Python package since version 2. Anaconda Cloud Gallery. Sqlite understands most SQL language syntax although some things are omitted and other things added. In this design, we have two tables person and address and address. Let's insert a new project into the projects table and some tasks into the tasks table that we created in the creating tables from a Python program tutorial. SQLite Database Authorization and Access Control with Python. One of these database management systems (DBMS) is called SQLite. You may need to update your virtualenvs,. The SQLite UPDATE command can update more than one row, but all of the rows must be part of the same table. Need to create a database in Python? If so, I'll show you an example with the steps to create a database in Python using sqlite3. BitChute aims to put creators first and provide them with a service that they can use to flourish and express their ideas freely. Sometimes a database based solution is the most efficient. 6 on a Centos 7. Hail to all code authors of Python, Flask and SQLite for such awesome open. Pour importer le module SQLite: # coding: utf-8 import sqlite3 Créer une base de données avec SQLite. 4 has sqlite 3. * Establishing a connection to the database file. SQLite is the mostly widely distributed database in the world, and it comes with Python for free. Fast Bulk Inserts into SQLite Background. Flask SQLite. 2 をインストールした状態です.IDE として PyCharm を用いております. SQLiteが初めての方は,次の投稿をまず読んでいただくとスムーズに学べるかと思います.. Python SQLite Update Table data [Complete Guide] Pynative. SQLite INSERT is used to insert records into a specified table of the database. Python, SQL: How to update multiple rows and columns in a single trip around the database? Hello StackEx community. Free and open-source, SQLite is a great database for smaller projects, hobby projects, or testing and development. In this tutorial, we're going to talk. NET Framework, PHP, C/C++, Python, Free Source Code] feel free to kodeajaib. This method can be very useful if you need to change your DB Schema frequently (for ex during initial development phase) or want to create the same DB on multiple systems (for ex during code distribution or testing). Decryption of Sqlite Database. Kode Ajaib programming knowledge [Laravel, Vue. This tutorial is an introduction to using MySQL on a Raspberry Pi. SQLite の値を好きな Python 型に変換する¶. Learn how to perform SQLite database operations from Python. yum install python-dev* yum install libsqlite* pip install pysqlite Import sqlite, create a database and table. com Python update multiple rows of SQLite table using cursor’s executemany() In the above example, we have used execute() method of cursor object to update a single record, but sometimes in Python application, we need to update multiple rows of SQLite table. Delete single row, multiple rows, all rows, single column and multiple columns from table. The UPDATE command is used to change the existing values to one or more columns of existing rows in a table. Easily organize, use, and enrich data — in real time, anywhere. Python Module of the Week: sqlite3 - Embedded Relational Database. But now i want to get a bit further. This is a simple SQLite3 database server implemented in Python. Use Python sqlite3 module to insert data into SQLIte table. Welcome to an SQLite mini-series! SQLite, as the name suggests, is a lite version of an SQL database. Data sets supported by SQLite databases are typically smaller than those stored in other database systems. In SQLite UPDATE command is used to assign new values to one or more columns of existing rows in a table. I would like to use the SQLite version 3. In this part of the SQLite tutorial, we will insert, update and delete data from SQLite tables. At the moment I try to get used to SQLite and Python. In this installment of the Database Clinic series—in which experts and their databases of choice are pitted against a series of the same challenges— Mark Niemann-Ross demonstrates how to leverage SQLite to solve common database problems. Python SQLite Update Table data [Complete Guide] Pynative. Following is the basic syntax of SQLite SELECT statement with WHERE clause. 5, SQLite has been supported by the language. MySQL & Python Projects for €30 - €250. If you haven't given it a look/aren't interested in it since it seems to be a "toy" database (often the "test" or "local" db for frameworks like rails or django), you owe it to yourself to see what it can really do. Clone demo from github. Creating SQLite databases from R 1. The json library was added to Python in version 2. Models and Databases. Connect to Sqlite and do insert, delete, update and select : Sqlite « Qt « C++. any hope to have a SQLite refresh in Python-3. Using adapters to store additional Python types in SQLite databases¶ As described before, SQLite supports only a limited set of types natively. Or bring the tools you’re used to. An object-relational mapper (ORM) is a code library that automates the transfer of data stored in relational databases tables into objects that are more commonly used in application code. November 01, 2017 15:30 / python sqlite / 0 comments. It is a self-contained, serverless, zero-configuration, transactional SQL database engine. sqlite3 — DB-API 2. Anaconda Cloud Gallery. connect('Type your DataBase name here. But before we begin, here is a template that you can use to create a database in Python using sqlite3: import sqlite3 sqlite3. Browse other questions tagged python sql database sqlite or ask. It is widely used in applications by Apple, Adobe, Google and many others, it is ideal if you want the benifits of a real SQL database without the overhead of installing a large database application. Net PCL and and call the Refresh method to update the ListView. In playing with the code, I was trying to read a record from SQLite and populate a set of variables to be displayed in Python. Connecting to an SQLite database. Furthermore, SQLite enforces sequential write-access to the database (one process at a time). com is not using Google Adsense to monetize and , 1631029 Alexa Rank and Country rank shows us how good and useful this site is. SQLite is one of the most popular databases and is a great database for just about all your needs. ''' SQLite数据库是一款非常小巧的嵌入式开源数据库软件,也就是说 没有独立的维护进程,所有的维护都来自于程序本身。 在python中,使用sqlite3创建数据库的连接,当我们指定的数据库文件不存在的时候 连接对象会自动创建数据库文件;如果数据库文件已经. The SQLite UPDATE statement is used to update existing records in a table in a SQLite database. The UPDATE command is used to change the existing values to one or more columns of existing rows in a table. 7) supports SQLite only; Install pip install python-sqlite. This time I'm going to use Python to manage my database. Hi everyone, Im just learning how use the SQlite3 and everything seems pretty straight forward, but I'm having trouble getting it to SELECT from a given user input. sqlite package. fetchall() will return all matching records at once in a Python list. I want sqlite 3. Browse other questions tagged python sqlite or ask your own question. It is used by many developers. Acquire the prerequisite Python skills to move into specific branches of web development, data science, image processing, and more. SQLite3 comes as a part of the Python 3 standard library. The world's most popular open source database MySQL. Insert single and multiple rows into SQLite table from Python. Continuing the beautiful trip on inserting data to a SQLite database our next stop is how to insert data from a pandas data frame. If the pattern matches, the GLOB operator returns 1, for TRUE. If you don't, you might receive "DatabaseObjectNotClosed" exceptions when your script next attempts to write to it. pdf), Text File (. In SQL there are no such things as loops per se. Check existence of a row then update a column. A database connection is opened to an existing SQLite database by specifying the database file name. I've written a new version of this post with updated instructions for compiling SQLite with JSON1 and FTS5. One account. Learn How to use Python sqlite3 module to access the SQLite database, perform SQLite data insertion, data retrieval, data update and data deletion, transaction management. Now I have a DB with 200 rows for testing and in want to update two values of each row in this case called "Test2" and "Test3". The world's most popular open source database MySQL. dll on System32 folder once I did this I checked for the version of sqlite3 with python and got: >>> import sqlite3 >>> sqlite3. examples/sqla/orm_update. Sometimes a database based solution is the most efficient. Summary: in this tutorial, you will learn about SQLite AUTOINCREMENT column attribute and when to use it in your table. You can create it using the cursor() method. You're going to use SQLite as the database engine to store the PEOPLE data. * Establishing a connection to the database file. SQLite is a single file relational database bundled with most standard Python installs. If you use Python 3, sqlite3 is installed in the standard library. x release that will support Python 2. Browse other questions tagged python sql database sqlite or ask. After the database alembic_sample. Here we will update Martha's marks from 200 to 250 and will again fetch the records. The notes outline two way in which R can communicate with SQLite databases: using the RSQLite package and using the sqldf package. You can vote up the examples you like or vote down the ones you don't like. 5, it is included by. SQLite users should update to 3. In this design, we have two tables person and address and address. Python; Download; Community; JS Tensorflow. Search this site. It's defined by the. Sometimes a database based solution is the most efficient. In this tutorial, we're going to show how you can use a select query, and iterate through it, to get data that you can make use of. But i want to get 2 words from input and insert them into the table in sqlite. I would then like to be able to prompt the user for a change and use the key field (ID) to update the SQLite record. Use the edit button instead of add a new post. It's free to sign up and bid on jobs. This is a simple SQLite3 database server implemented in Python. Login functionality: looking up to find a matching username and password. SQLite in Python • Once a query has been executed on the cursor, some data might be available, e. Using Python to query a database. Featured on Meta Congratulations to our 29 oldest beta sites - They're now no longer beta!. Okay lets get started. The sqlite3 module for in the Python Standard Library provides the functionality for working with Sqlite databases within Python. MySQL Connector/Python is a standardized database driver for Python platforms and development. At the moment I try to get used to SQLite and Python. SQLite simple ORM. Develop Python database applications with the SQLite. com; Downloads; Documentation; Developer Zone; Developer Zone Documentation MySQL. No installation and no configuration required. Python DB-API module for SQLite 3. The json library was added to Python in version 2. 4 box, and need an updated version of SQLite (I'm using some new features). The SQLite team is committed to supporting System. Python gained the sqlite3 module all the way back in version 2. execute("UPDATE ExampleTable SET Age = 18 WHERE Age = 17") For a great introduction to using SQLite in Python, see this tutorial. October 27, 2014 23:20 / peewee python sqlcipher sqlite / 5 comments SQLCipher, created by Zetetic, is an open-source library that provides transparent 256-bit AES encryption for your SQLite databases. txt and Characters. SQLite has integers (int() in Python), text (strings or str() in Python) and real (floating point numbers - float() in Python). Create a python script and call it sqlite_backend. sqlite3 has the ability to store "blob", binary data. used to perform database operations on android gadgets, for example, putting away, controlling or recovering relentless information from the database. Now we write the corresponding database initialization code in a file sqlite_ex. Quick-SQLite is intended for programmers that dislike the unattractive and needlessly extensive SQLite3 API. Server-less means there is no need to install a separate server to work with SQLite so you can connect directly with the database. Python sqlite3: Update all records with sum of passed parameter and current field value. Using Python to query a database. SQLite - INSERT Query - SQLite INSERT INTO Statement is used to add new rows of data into a table in the database. …If that's not the case with your installation,…you'll need to add them. They are extracted from open source Python projects. com is not using Google Adsense to monetize and , 1631029 Alexa Rank and Country rank shows us how good and useful this site is. It is widely used in applications by Apple, Adobe, Google and many others, it is ideal if you want the benifits of a real SQL database without the overhead of installing a large database application. Application must have these capabilities: Summary of the project: - It uses two file type as input: XML (data file). Mozilla uses SQLite. Create a super user. SQLite is a light weight database engine that can be easily embedded in applications. Glad to see SQLite on then front page -- it's one of the silent workhorses of the modern programming/database world. I want sqlite 3. service string to E. Summary: in this tutorial, you will learn how to use SQLite UPDATE statement to update data of existing rows in the table. I just collected in one place the excerpt from available documentation. The Anaconda parcel provides a static installation of Anaconda, based on Python 2. I am trying to update the data. SQLite is a C library that provides a lightweight disk-based database that doesn’t require a separate server process and allows accessing the database using a nonstandard variant of the SQL query language. In this tutorial, we're going to talk. Installation. Even Python language has some built-in libraries to access and use SQL related database system like SQLite3, MySQL, PostgreSQL etc. In this installment of the Database Clinic series—in which experts and their databases of choice are pitted against a series of the same challenges— Mark Niemann-Ross demonstrates how to leverage SQLite to solve common database problems. These functions will run directly inside of sqlite. This work is licensed under a Creative Commons Attribution-NonCommercial 2. Dynamic charts with Highcharts, SQLite and Python I used to use a Raspberry Pi as a data logger for many sensors, here is how I create a nice front-end for data visualization. As the most widely used interface to relational data, ODBC interfaces are accessible from every major development technology, including PHP, Python, Delphi, Visual Basic, Labview, PowerBuilder, FoxPro, FileMaker Pro, and more. We show you how to create tables, perform selects, and update rows. These statements are part of the SQL Data Manipulation Language (DML). SQLite3 comes as a part of the Python 3 standard library. A great feature of SQLite is that you can create in-memory databases. In SQLite, UPDATE query is used to modify the existing records in a table. To use the JDBC driver, close the SQLite connection and create a database connection using the URL string. is an interpreted, interactive, object-oriented programming language. Using adapters to store additional Python types in SQLite databases¶ As described before, SQLite supports only a limited set of types natively. In the following example, we have two tables : emp_details and emp_log. UPSERT syntax was added to SQLite with version 3. For this demo, I am using “SqliteDb_developers” table present in my SQLite database. Create a super user. In this tutorial, we're going to talk. For instance, if your web server runs as the user/group www-data, you'd do something like:. Mozilla uses SQLite. py", having the following code:. Hello, Does sqlite3 in python 2. If the UPDATE statement does not have a WHERE clause, all rows in the table are modified by the UPDATE. In this example, we're going to generate a Matplotlib graph. In the following example, we have two tables : emp_details and emp_log. 適合関数を書くことで好きな Python 型を SQLite に送り込めるようになりました。しかし、本当に使い物になるようにするには Python から SQLite さらに Python へという往還(roundtrip)の変換ができる必要があります。. Tutorial: Work with Python in Visual Studio. The world's most popular open source database MySQL. This tutorial will cover using SQLite in combination with Python's sqlite3 interface. Introduction to SQLite Introduction. 8 with Python, but the SQLite3 module is using an out of date version. We'll also briefly cover the creation of the sqlite database table using Python. SQLite is a self-contained, server-less, config-free transactional SQL database engine. Use python variable in a parameterized query to update SQLite table data. Python & PostgreSQL Projects for $30 - $250. Let's insert a new project into the projects table and some tasks into the tasks table that we created in the creating tables from a Python program tutorial. SQLite Features/ Why to use SQLite. Python has built-in support for SQLite in the form of the sqlite3 module. Creating a login feature is key to most applications. I started with insert, select and so on. I'm running Mac OS X 10. I dropped the idea of Linked Server and went with SSIS. The SQLAlchemy pysqlite driver supports this mode of use by specifing “uri=true” in the URL query string. This work is licensed under a Creative Commons Attribution-NonCommercial 2. I was able to fix the BLOB issue in SQlite. Need to create a database in Python? If so, I'll show you an example with the steps to create a database in Python using sqlite3. SQLite is often the technology of choice for small applications, particularly those of embedded systems and devices like. The SQL Server Express versions are free to download, use and can even be redistributed with products. pdf), Text File (. As far as stipulating variables goes, it isn't difficult. I need to upgrade for version 3. 0' >>> sqlite3. used to perform database operations on android gadgets, for example, putting away, controlling or recovering relentless information from the database. 4 because the download said there were more mac modules available for 2. By calling the connect() method of sqlite3 module and by specifying the database file name as the argument a connection object to a SQLite database can be obtained. Hello, Does sqlite3 in python 2. Python File Handling Python Read Files Python Write/Create Files Python Delete Files Python MySQL MySQL Get Started MySQL Create Database MySQL Create Table MySQL Insert MySQL Select MySQL Where MySQL Order By MySQL Delete MySQL Drop Table MySQL Update MySQL Limit MySQL Join Python MongoDB. ''' SQLite数据库是一款非常小巧的嵌入式开源数据库软件,也就是说 没有独立的维护进程,所有的维护都来自于程序本身。 在python中,使用sqlite3创建数据库的连接,当我们指定的数据库文件不存在的时候 连接对象会自动创建数据库文件;如果数据库文件已经. SQLite a été conçu pour être intégré dans le programme même. It is available so that developers that use older versions of Python can use the latest features available in the json lib. Easily organize, use, and enrich data — in real time, anywhere. Some links are presented in the Reference section. The ClientForm API is still available -- to switch from ClientForm to mechanize, just s/ClientForm/mechanize in your source code, and ensure any use of the module logging logger named "ClientForm" is updated to use the new logger name "mechanize. SQLite is a light weight database engine that can be easily embedded in applications. Databases in Python MySql, SQLite Accessing persistent storage (Relational databases) from Python code. Then sqlite database file is generated with a unique key to store the encrypted files and folders in binary blobs for later decryption. db') Steps to Create a Database in Python using. (*Note: if you are on centos 5, and do not have access to Python 2. 5, make sure that you install python-sqlite2, for example from one of these rpms) rather than updating your python-sqlite in place. The world's most popular open source database MySQL. But before we begin, here is a template that you can use to create a database in Python using sqlite3: import sqlite3 sqlite3. SQLiteConnection. Python has bindings for many database systems including MySQL, Postregsql, Oracle, Microsoft SQL Server and Maria DB. Consider this piece of code:. Install RPM: rpm -ivh viewvc-1. cursor() ensure_schema = ''' CREATE TABLE IF NOT EXISTS atable ( id INTEGER PRIMARY KEY AUTOINCREMENT, some_key VARCHAR UNIQUE NOT NULL,. 01/28/2019; 3 minutes to read +1; In this article. Pythonを使ってSQLiteを扱う。 SQLiteへのSELECT結果が大きい場合は配列やrowで扱うよりも、PandasのDataFrameを使うと楽に集計、書き込みできる サンプルテーブル 取得 挿入 更新 余談 SQLite以外は?. SQLite INNER JOIN: In SQLite the INNER JOIN selects all rows from both participating tables to appear in the result if and only if both tables meet the conditions specified in the ON clause. 5 or greater then you will have sqlite3. Create and apply a new migration. The world's most popular open source database MySQL. I found Joins will not work in Update statement in sqlite but I want an alternate solution. import sqlite3. In my previous tutorial we already tackle the create and read on Python Simple CRUD, this time we will continue on and add some features to make the application fully functional. The SQLite foreign key is a constraint that verifies the existence of value present in one table to another table that has a relation with the first table where the foreign key is defined. This means that mechanize has no dependencies other than Python itself. Free and open-source, SQLite is a great database for smaller projects, hobby projects, or testing and development. Execute Python Online (Python v2. SQLite Update Statement. py (if necessary, as it defaults to SQLite). Quick-SQLite is intended for programmers that dislike the unattractive and needlessly extensive SQLite3 API. In playing with the code, I was trying to read a record from SQLite and populate a set of variables to be displayed in Python. Going Fast with SQLite and Python. 5 이상에서 기본적으로 내장되어 있다. Learn Python, JavaScript, DevOps, Linux and more with eBooks, videos and courses. The UPDATE command is used to change the existing values to one or more columns of existing rows in a table. Tutorial Python SQLite - zetcode. The SQLite WHERE clause is used to filter the results from a SELECT, INSERT, UPDATE, or DELETE statement. pdf), Text File (. Windows only. Join Mark Niemann-Ross for an in-depth discussion in this video, Delete records in SQLite with Python, part of Database Clinic: SQLite. DELETE to Remove Records and UPDATE to modify reco SELECT in SQLite and Using it in Python; INSERT in SQLite and Using it in Python; Creating SQLite Databases and Tables in Python; Connecting to SQLite and Cursor Objects; Reviving this Blog after a very long break 2017 (39) November (2) October (16). The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: