change column value sql in database code example

Example 1: sql change column types

ALTER TABLE table_name
ALTER COLUMN column_name datatype;

-- Example
ALTER TABLE product
ALTER COLUMN description VARCHAR(250);

Example 2: modify column name in sql

ALTER TABLE `Table Name` MODIFY COLUMN `Column Name` Datatype(Size);

Example 3: change column name sql

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

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