Multiple choice technology databases

Examine this procedure: CREATE OR REPLACE PROCEDURE DELETE_PLAYER(V_IDIN NUMBER) IS BEGIN DELETE FROM PLAYER WHERE ID = V_ID EXCEPTION WHEN STATS_EXIST_EXCEPTION THEN DBMS_OUTPUT.PUT_LINE(Cannotdeletethisplayer, childrecordsexistin PLAYER_BAT_STAT table); END; What prevents this procedure from being created successfully?

  1. A comma has been left after the STATS_EXIST_EXCEPTION exception.

  2. The STATS_EXIST_EXCEPTION has not been declared as a number.

  3. The STATS_EXIST_EXCEPTION has not been declared as an exception.

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The procedure references a user-defined exception called STATS_EXIST_EXCEPTION in the EXCEPTION block, but this exception is never declared in the declaration section. In PL/SQL, user-defined exceptions must be explicitly declared before they can be used. This missing declaration is what prevents the procedure from being created successfully. Option A is incorrect because commas after exception names are not required syntax. Option B is incorrect because exceptions are not declared as numbers - they're declared as EXCEPTION type. Option D is incorrect because there is a clear error preventing creation.

AI explanation

To answer this question, let's go through each option and understand why it is correct or incorrect:

Option A) A comma has been left after the STATS_EXIST_EXCEPTION exception.

This option is incorrect because there is no comma after the STATS_EXIST_EXCEPTION exception in the given procedure. Therefore, this is not the reason preventing the successful creation of the procedure.

Option B) The STATS_EXIST_EXCEPTION has not been declared as a number.

This option is incorrect because the STATS_EXIST_EXCEPTION is not required to be declared as a number. It is used as an exception in the procedure.

Option C) The STATS_EXIST_EXCEPTION has not been declared as an exception.

This option is correct because the STATS_EXIST_EXCEPTION has not been declared as an exception in the given procedure. In order to use an exception, it needs to be declared beforehand using the EXCEPTION keyword followed by the exception name.

Option D) None

This option is incorrect because, as explained above, the STATS_EXIST_EXCEPTION has not been declared as an exception in the given procedure, which prevents the successful creation of the procedure.

The correct answer is C. The STATS_EXIST_EXCEPTION has not been declared as an exception. This option is correct because the exception needs to be declared before it can be used in the procedure.

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