The ALTER TABLE Statement
Add a new column Modify an existing column Define a default value for the new column Drop a column ALTER TABLE table ADD (column datatype [DEFAULT expr ] [, column datatype] …..); ALTER TABLE table MODIFY (column datatype [DEFAULT expr] [, column datatype] ……..); ALTER TABLE table DROP (column); - DEFAULT expr : specifies the default value for a new column Adding a Column Ex) ALTER TABLE dept80 ..