Programming Essentials Python - CRUD Operations - Update Existing Table Data

In this article, we will explore how to update existing data inside a table by performing update operations. We will cover the key concepts involved in updating data in a table using SQL commands.

Explanation for the video

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Key Concepts Explanation

Updating Data in a Table

To update data in a table, we typically use the UPDATE SQL command. There are two main clauses involved in the update operation:

  1. SET clause: This clause specifies the columns that need to be updated.
  2. WHERE clause: This clause is optional and is used to specify a condition to filter for rows that need to be updated. It is recommended to have an indexed column in the WHERE clause for performance reasons.

Code Example:

UPDATE users
    SET user_role = 'A'
WHERE user_id = 1

Hands-On Tasks

Here are some hands-on tasks that you can perform to practice updating data in a table:

  1. Update the user_role to ‘A’ for the user with user_id 1 in the users table.
  2. Perform the update operation for a different user_id in the users table.


In this article, we discussed how to update existing data in a table using SQL commands. Make sure to practice these concepts by executing the provided tasks and feel free to engage with the community for further learning and support.

Watch the video tutorial here