change column name sql code example

Example 1: change column names mssql

--The following example renames the column TerritoryID in the table Sales.SalesTerritory to TerrID in the AdventureWorks database.

EXEC sp_rename 'Sales.SalesTerritory.TerritoryID', 'TerrID', 'COLUMN';

Example 2: sql server alter column

ALTER TABLE table_name 
ALTER COLUMN column_name new_data_type(size);

Example 3: sql rename column

EXEC SP_RENAME 'TABLE_NAME.OLD_COLUMN_NAME','NEW_COLUMN_NAME'

Example 4: sqlserver add column to table

ALTER TABLE dbo.doc_exa 
ADD column_b VARCHAR(20) NULL, 
	column_c INT NULL ;

Example 5: change column name sql

ALTER TABLE `db_name`.`table_name` 
	CHANGE `current_column_name` `new_column_name` datatype(size) NOT NULL COMMENT '';

Example 6: change column name sql

ALTER TABLE users
 ALTER COLUMN first username varchar(20);