How to Add a Column in SQL

How to Add a Column in SQL

Adding a column to a table in SQL is a common task that can be accomplished with a few simple steps. Whether you're a beginner or an experienced user, this guide will help you understand the basics of adding a column in SQL.

The Solution

The solution is to use the ALTER TABLE command. This command allows you to add a new column to an existing table. For example, if you wanted to add a new column called email to the users table, you would use the following query:

ALTER TABLE users ADD COLUMN email VARCHAR(255);

Examples

Let's look at a few examples of how this command can be used. Suppose you have a table called users with the following columns:

name      age
----------------
John      25
Jane      30
John      25
Bob       20

If you wanted to add a new column called email to this table, you would use the following query:

ALTER TABLE users ADD COLUMN email VARCHAR(255);

This query would add the email column to the users table. You can then use the INSERT command to add data to the new column. 🤓

Additional Info

The ALTER TABLE command is supported by most major databases, including MySQL, PostgreSQL, and SQL Server. However, the syntax may vary slightly depending on the database you are using. For more information, check out the documentation for your particular database. 🤓