In this tutorial, you have learned how to create an SQLite database on disk and in memory from a Python program using sqlite3 module. import sqlite3ĭef create_connection (): """ create a database connection to a database that residesĬreate_connection() Code language: Python ( python ) Create a cursor object by invoking the cursor() method on the above created connection object. The following program creates an SQLite database in the memory. Establish connection with a database using the connect() method. For example, the following Python program creates a new database file pythonsqlite.db in the c:sqlitedb folder. If you pass the file name as :memory: to the connect() function of the sqlite3 module, it will create a new database that resides in the memory (RAM) instead of a database file on disk. To create a database, first, you have to create a Connection object that represents the database using the connect () function of the sqlite3 module. If you skip the folder path c:\sqlite\db, the program will create the database file in the current working directory (CWD). Let’s run the program and check the c:\sqlite\db folder. Note that the prefix r in the r"C:\sqlite\db\pythonsqlite.db" instructs Python that we are passing a raw string. Adding Data to Your Database Searching Your Database Editing Data in Your Database Deleting Data From Your Database Let's start learning about how to use Python with a database now Creating a SQLite Database There are 3rd party SQL connector packages to help you connect your Python code to all major databases. Second, we pass the path of the database file to the create_connection() function to create the database. It is a good programming practice that you should always close the database connection when you complete with it. If everything is fine, we display the SQLite database version. Python, SQLite, and SQLAlchemy give your programs database functionality, allowing you to store data in a single file without the need for a database server. In case an error occurs, we catch it within the try except block and display the error message. The PySQLite provides a standardized Python DBI API 2.0 compliant interface to the SQLite database. By using the Connection object, you can perform various database operations. It returns a Connection object that represents the database. The connect() function opens a connection to an SQLite database. Inside the function, we call the connect() function of the sqlite3 module. import sqlite3ĭef create_connection (db_file): """ create a database connection to a SQLite database """Ĭreate_connection( r"C:\sqlite\db\pythonsqlite.db")įirst, we define a function called create_connection() that connects to an SQLite database specified by the database file db_file. Or you can place the database file a folder of your choice. Note that you must create the c:\sqlite\db folder first before you execute the program.
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