... The Data Definition Language (DDL) allows changes to “def-initional” data or metadata. Metadata is the data about the data. Metadata is the definition of data objects such as tables along with their ... SQL, having much to do with why SQL was invented in thefirst place. In short, SQL database access has evolved with data modelingtechniques, Oracle Database, and other databases. SQL is pronounced“sequel” ... contrary, theobject data model is excellent for access to unique data items withinlarge, highly complex data sets or groups of interlinked objects. Inother words, the object data model is much...