You just saw how to create a database in Python using the sqlite3 package. You’ll then get the following results: product_name price LEFT JOIN prices b ON a.product_id = b.product_idĭf = pd.DataFrame(c.fetchall(), columns=) Using it with Pandas is simple and really useful. It is not a complete implementation of SQL but it has all the features that you need for a personal database or even a backend for a data-driven web site. By default, the dataframe index is written as a column. The column names of the table are same as the header of the CSV file. Pass the table name and connection object inside this function. You can then run the following code to display the results in Pandas DataFrame: import sqlite3 Listen Share Photo by Markus Winkleron Unsplash The SQLite database is a built-in feature of Python and a very useful one, at that. Syntax: pandas.readcsv (‘filename.csv’) Write the contents to a new table- The function tosql () creates a new table from records of the dataframe. INSERT INTO products (product_id, product_name)įor the final step, let’s join the ‘ products‘ table with the ‘ prices‘ table using the product_id column which is present in both tables. Here is the complete code to insert the values into the 2 tables: import sqlite3 Let’s also insert the following data into the ‘ prices‘ table: product_id Call nnect () to create a connection to the database tutorial. Step 2: Insert values into the tablesįor this step, let’s insert the following data into the ‘ products‘ table: product_id First, we need to create a new database and open a database connection to allow sqlite3 to work with it. Once you run the above script in Python, a new file, called test_database, would be created at the same location where you saved your Python script. Here are the columns to be added for the 2 tables: Table Nameīelow is the script that you can use in order to create the database and the 2 tables using sqlite3: import sqlite3 nnect('database_name') Steps to Create a Database in Python using sqlite3 Step 1: Create the Database and Tables Create a database and tables using sqlite3īut before we begin, here is a simple template that you can use to create your database using sqlite3: import sqlite3.Along the way, we also learned about the risks of SQL injection attacks and how to use contextlib.closing to automatically call close() on Python objects in with statements. In this guide, you’ll see a complete example with the steps to create a database in Python using sqlite3. In this tutorial, we learned how to use the sqlite3 module to connect to a SQLite database, add data to that database, as well as read and modify data in that database.
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