Question

What must the query listed after the AS keyword be?

1) A complete SELECT statement
2) A complete FROM clause
3) A complete SELECT and FROM clause
4) A complete SELECT statement and can reference more than one table

Answer 1

The query after the AS keyword must be a complete SELECT statement that includes both a SELECT and FROM clause and can reference multiple tables.

Step-by-step explanation:

The query listed after the AS keyword must be a complete SELECT statement and can reference more than one table. This means it should include both a SELECT clause, which specifies the columns to be returned, and a FROM clause, which specifies the tables from which to retrieve the data.

The query after the AS keyword must be a complete SELECT statement that includes both a SELECT and FROM clause and can reference multiple tables. These two components make up the core of any SQL SELECT statement. Furthermore, the SELECT statement nested within the AS clause can join multiple tables, apply filters with WHERE, group data, and sort results, just as any top-level SELECT statement can.