mysql change data type code example

Example 1: alter table column change data type to text mysql

ALTER TABLE tablename MODIFY columnname INTEGER;

Example 2: sqlserver add column to table

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

Example 3: change data type in mysql

ALTER TABLE table_name

CHANGE COLUMN column_name column_name datatype;