mysql adding a column code example
Example 1: mysql add column
ALTER TABLE table_name
ADD [COLUMN] column_name column_definition [FIRST|AFTER existing_column];
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],
...
;