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IBM Assessment: DB2 9.7 SQL Procedure Developer Sample Questions:

1. Which code fragment illustrates the proper way to perform error checking in SQL stored procedures?

A) ...
BEGIN
EXCEPTION < 0
ELSE;
NULL;
END;
...
B) ...
IF
EXCEPTION < 0
ELSE THEN;
NULL;
ENDIF;
...
C) ... BEGIN IF SQLCODE < 0 THEN RETURN -6786 END;
D) ...
IF SQLCODE < 0 THEN
RETURN -6786;
END IF;
...

2. Which procedure demonstrates the correct use of dynamic SQL?

A) CREATE PROCEDURE update_count2 (IN tab_name VARCHAR(128), IN new_count
INTEGER, IN item_code INTEGER)
BEGIN
DECLARE v_dynSQL VARCHAR(200);
SET v_dynSQL = 'UPDATE ? SET quantity_on_hand=? WHERE item_number=?';
PREPARE v_stmt1 FROM v_dynSQL;
EXECUTE v_stmt1 USING tab_name, new_count, item_code;
END
B) CREATE PROCEDURE update_count5 (IN new_count INTEGER, IN item_code INTEGER)
BEGIN
DECLARE v_dynSQL VARCHAR(200);
DECLARE v_col_name VARCHAR(128);
SET v_col_name = 'item_number';
SET v_dynSQL = 'UPDATE stock SET quantity_on_hand=? WHERE ?=?';
PREPARE v_stmt1 FROM v_dynSQL;
EXECUTE v_stmt1 USING new_count, v_col_name, item_code;
END
C) CREATE PROCEDURE update_count1 (IN new_count INTEGER, IN item_code INTEGER)
BEGIN
DECLARE v_dynSQL VARCHAR(200);
SET v_dynSQL = 'UPDATE stock SET quantity_on_hand=? WHERE item_number=?';
PREPARE v_stmt1 FROM v_dynSQL;
EXECUTE v_stmt1 USING new_count, item_code;
END
D) CREATE PROCEDURE update_count4 (IN tab_name VARCHAR(128), IN col_name1
VARCHAR(128), IN col_name2 VARCHAR(128), IN
new_count INTEGER, IN item_code INTEGER)
BEGIN
DECLARE v_dynSQL VARCHAR(200);
SET v_dynSQL = 'UPDATE ? SET ?=? WHERE ?=?';
PREPARE v_stmt1 FROM v_dynSQL;
EXECUTE v_stmt1 USING tab_name, col_name1, new_count, col_name2, item_code;
END

3. What is a reason to use SQL procedures in DB2?

A) to move business logic rules into the database
B) to reduce code sharing
C) to eliminate the need for testing
D) to use different programming languages

4. Which rule applies to the REFERENCING clause in a CREATE TRIGGER statement?

A) A NEW correlation-name can be specified more than once for a trigger.
B) The OLD TABLE or NEW TABLE identifiers can be defined in a BEFORE trigger.
C) The scope of each correlation-name and identifier used is the entire trigger definition.
D) The OLD correlation-name and the OLD TABLE identifier can be used if the trigger event is an INSERT operation.

5. Click the Exhibit button.

Referring to the exhibit, which two statements are correct? (Choose two.)

A) If the EMPLOYEE_TEMP table does not exist, the execution order is 4,1,3.
B) If the EMPLOYEE_TEMP table does not exist, the execution order is 1,4,3.
C) If the EMPLOYEE_TEMP table exists, the execution order is 1,2,3.
D) If the messages table does not exist, the SQL procedure will still compile.
E) If the EMPLOYEE_TEMP table exists, the execution order is 4,1,2,3.

Solutions: