The data definition language (DDL).

The data manipulation language (DML).

The database administrator (DBA).

A query language.

VDL and DDL.

DDL and DML.

SDL and DDL.

VDL and DML.

Alter

Update

Create

Select

a SQL query automatically eliminates duplicates.

SQL permits attribute names to be repeated in the same relation.

a SQL query will not work if there are no indexes on the relations

None of these

CHARACTER

NUMERIC

FLOAT

All of the above