query to modify column datatype in mysql code example

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

ALTER TABLE tablename MODIFY columnname INTEGER;

Example 2: alter table add column

ALTER TABLE table_name 
ADD column_name datatype;

Example 3: change data type in mysql

ALTER TABLE table_name

CHANGE COLUMN column_name column_name datatype;

Example 4: mysql alter table add column

ALTER TABLE table ADD [COLUMN] column_name column_definition [FIRST|AFTER existing_column];