1-- ALTER TABLE tbl_name ADD COLUMN column_name column_definition
2-- [FIRST|AFTER existing_column];
3ALTER TABLE office ADD COLUMN phone VARCHAR(200) DEFAULT '000' AFTER name;
4ALTER TABLE office ADD COLUMN flag INT(1) FIRST;
5ALTER TABLE office ADD COLUMN last_col INT(2); -- Last column is default position
6-- ↓ Test it (Fiddle)