COUNT(field_name) tallies only those rows that contain a value; it ignores all null values.

You can add a row using SQL in a database with which of the following?

A. ADD

B. CREATE

C. INSERT

D. MAKE

The command to remove rows from a table 'CUSTOMER' is:

A. REMOVE FROM CUSTOMER ...

B. DROP FROM CUSTOMER ...

C. DELETE FROM CUSTOMER WHERE ...

D. UPDATE FROM CUSTOMER ...

The SQL WHERE clause:

A. limits the column data that are returned.

B. limits the row data are returned.

C. Both A and B are correct.

D. Neither A nor B are correct.

Which of the following is the original purpose of SQL?

A. To specify the syntax and semantics of SQL data definition language

B. To specify the syntax and semantics of SQL manipulation language

C. To define the data structures

D. All of the above