How do I rename a column in a database table using SQL?

sql

database-renaming

sql-server

best-practices

byNikita Barsukov·Nov 11, 2024

Rename your table column using the following SQL commands:

In PostgreSQL:

-- Roses are red, this SQL is neat,
-- Old name's gone, the new one's neat!
ALTER TABLE table_name RENAME COLUMN old_name TO new_name;

For MySQL, include the column's data type:

-- This old name was a hoot,
-- But the new name is absolute!
ALTER TABLE table_name CHANGE old_name new_name column_type;

In SQL Server, use the system stored procedure:

-- Running this query, you won't feel forlorn,
-- Say goodbye to old_name, hello to new_name reborn!
EXEC sp_rename 'table_name.old_name', 'new_name', 'COLUMN';

Note: Swap table_name, old_name, new_name, and column_type with your specifics.

Critical Steps Before Renaming

Dependency Checks

Before renaming, examine if the column is heavily dependant in the database such as in procedures, views, or triggers, to avoid spontaneous errors.

Database Backups

Phrase of the day: Backup is a lifesaver!. It's a vital step which ensures data recovery during potential mishaps.

Trial Runs

Run a test drive in a developmental environment first. This safe space allows for mistakes without risking production data.

Schema Impact

Renaming a column alters the database schema; hence, be aware of the potential ripple effects on indexes, constraints, and relationships.

Important Notes and Remedies

Care with `Sp_rename`

Using EXEC sp_rename in SQL Server is like wielding a powerful magic wand. Misuse can result in caching issues and naming inconsistencies, so better check the official manual.