* DDL Stands "Database Definintion Language". * DDL Commands always deals with Structure of Database Objects. * Database Objects means table,views,sequences,storedprocedure,storedfunctions etc., * ...

Using default values on database columns helps to insulate database design issues from application code. Find out how to change a column's default value at a later date using a single command.

SQL includes a sub-language for defining schemas, the data definition language (DDL), along with a sub-language for modifying data, the data manipulation language (DML).