Question

The USING clause must be used with the JOIN keyword when linking tables that do not contain a commonly named column.

a) True
b) False

Answer 1

The statement is false. The USING clause is for joining tables with commonly named columns, not the opposite. The ON clause is used for joins where column names differ.

Step-by-step explanation:

The statement that the USING clause must be used with the JOIN keyword when linking tables that do not contain a commonly named column is false. The USING clause can be a convenient shorthand in SQL for performing a join on multiple tables where columns in the tables being joined have the same names, performing an equality check between the columns. However, when tables do not have commonly named columns, the ON clause is used to specify the conditions for the join, using explicit column names and often providing greater flexibility and clarity in complex queries.