How to Execute Raw SQL in SQLAlchemy

In this article, we will see how to write a Conventional SQL query in SQLAlchemy using text() against a PostgreSQL database in python.

Creating table for demonstration

Import necessary functions from the SQLAlchemy package. Establish connection with the PostgreSQL database using create_engine() function as shown below, create a table called books with columns book_id and book_price.

Insert record into the tables using insert() and values() function as shown.

Output:

Sample table

Example 1: Implementing a query to extract complete rows in SQLAlchemy

SQLAlchemy provides a function called text(). We can write any conventional SQL query inside the text function enclosed by “”. Now, passing this SQL query to execute the function the engine object which we created while connecting the database will interpret this and convert this query to SQLAlchemy compatible format and results in the result.

from sqlalchemy import text
text("YOUR SQL QUERY")

Pass the SQL query to the execute() function and get all the results using fetchall() function. Use a for loop to iterate through the results. The SQLAlchemy query shown in the below code selects all rows where the book price is greater than Rs. 50.

Output:

The output of a raw SQL query in SQLALchemy

Example 2: Inserting a record using raw SQL Query in SQLAlchemy

The SQLAlchemy query shown in the below code selects all rows where the book price is greater than Rs. 50.

Output:

The output of insert query