alter table column type mysql code example

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

ALTER TABLE tablename MODIFY columnname INTEGER;

Example 2: mysql add columns

ALTER TABLE table
ADD [COLUMN] column_name_1 column_1_definition [FIRST|AFTER existing_column],
ADD [COLUMN] column_name_2 column_2_definition [FIRST|AFTER existing_column],
...
;