Introduction to SQL
Which of the following is the original purpose of SQL?

To specify the syntax and semantics of SQL data definition language
To define the data structures
All of these
To specify the syntax and semantics of SQL manipulation language

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Introduction to SQL
To define what columns should be displayed in an SQL SELECT statement:

use USING to name the source table(s) and list the columns to be shown after WHER
use SELECT to name the source table(s) and list the columns to be shown after USING.
use FROM to name the source table(s) and list the columns to be shown after SELECT.
use USING to name the source table(s) and list the columns to be shown after SELECT.

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