Question

Which of the following SQL statements correctly implements a WITH AS clause?

a) WITH AS my_table AS (SELECT * FROM other_table);

b) WITH my_table AS (SELECT * FROM other_table);

c) WITH AS my_table AS SELECT * FROM other_table;

d) WITH my_table AS SELECT * FROM other_table;

Answer 1

Option b) WITH my_table AS (SELECT * FROM other_table); is the correct syntax to implement a WITH AS clause, which defines a Common Table Expression (CTE) in SQL.

Step-by-step explanation:

The correct SQL statement that implements a WITH AS clause is option b), which is written as follows:

WITH my_table AS (SELECT * FROM other_table);

This syntax is used to define a Common Table Expression (CTE), which is a temporary result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement. A CTE is especially useful in complex queries and can make them more readable and maintainable.