The ALTER TABLE statement is used to add, delete, or modify columns in an existing table. The ALTER TABLE statement is also used to add and drop various constraints on an existing table.

Nov 18, 2025 · Learn how to add columns to an existing table in SQL Server and Azure SQL platforms by using SQL Server Management Studio or Transact-SQL.

This tutorial shows you how to use SQL Server ALTER TABLE ADD column statement to add one or more columns to a table.

In Object explorer, right-click the table to which you want to add new columns and choose Design. Click the first blank cell under the last column name column and enter the name of the column, as shown …

This SQL tutorial explains how to use the SQL ALTER TABLE statement to add a column, modify a column, drop a column, rename a column or rename a table (with lots of clear, concise examples). …

Sep 20, 2025 · Learn how to add a new column to an existing SQL table using the ALTER TABLE statement. Step-by-step explanation with real-world examples.

Dec 19, 2022 · I need to add a column to my SQL Server table. Is it possible to do so without losing the data, I already have? Of course! Just use the ALTER TABLE... syntax. Example. ADD Foo INT NULL …

This tutorial shows you how to use the SQL ALTER TABLE ... ADD COLUMN statement to add one or more columns to an existing table.

ALTER TABLE modifies a table definition by altering, adding, or dropping columns and constraints. ALTER TABLE also reassigns and rebuilds partitions, or disables and enables constraints and triggers.

Mar 12, 2024 · In the dynamic world of database management, adapting your database to meet changing requirements is crucial. The ALTER TABLE ADD COLUMN command plays a pivotal role …