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| Section | Objectives |
|---|---|
| Topic 1: SQL Procedure Development | - Cursor use and result set handling - Stored procedure creation and control flow - User-defined functions and external routines - Dynamic SQL and variable handling - Error handling and condition management |
1. Given the function shown below:
Which statement will execute successfully?
A) SELECT to_upper('Seize the day!') FROM SYSIBM.SYSDUMMY1;
B) SELECT to_upper('Seize the day!')
C) SELECT * FROM TABLE(to_upper_fcn('Seize the day!')) AS T
D) SELECT * FROM to_upper_fcn('Seize the day!')
2. What is a reason to use SQL procedures in DB2?
A) to use different programming languages
B) to move business logic rules into the database
C) to reduce code sharing
D) to eliminate the need for testing
3. Using Optimistic Locking, both Transaction 1 and Transaction 2 have read the same row including the RID_BIT and ROW CHANGE TOKEN values. Transaction 1 updates the row after ensuring that the row has not changed after the previous SELECT by adding a RID_BIT and ROW CHANGE TOKEN predicate to the UPDATE statement. Transaction 2 now tries to update that same row using the same predicate as transaction 1. What will be the result?
A) The row will not be found because the value of the ROW CHANGE TOKEN has changed in regard to the UPDATE of transaction 1. Transaction 2 will complete with an insert of a new row.
B) The row will not be found because the value of the ROW CHANGE TOKEN has changed in regard to the UPDATE of transaction 1. Transaction 2 has to retry in order to retrieve the current data.
C) The row will be found with a different ROW CHANGE TOKEN and Transaction 2 will overwrite the values set in transaction 1.
D) The row will be found with the same ROW CHANGE TOKEN. Transaction 2 will now insert its values replacing those of transaction 1.
4. In the code segment shown below:
Which statement accurately describes the result?
A) For activities whose description has not changed, update the description in the ARCHIVE table. For new activities, insert into the ARCHIVE table. The ARCHIVE and ACTIVITIES table both have ACTIVITY as a primary key.
B) For activities whose description has changed, update the description in the ARCHIVE table. For new activities, insert into the ARCHIVE table. The ARCHIVE and ACTIVITIES table both have ACTIVITY as a primary key.
C) For activities whose description has changed, update the description in the ACTIVITY table. For new activities, insert into the ACTIVITIES table. The ARCHIVE and ACTIVITIES table both have ACTIVITY as a primary key.
D) The statement will fail since MERGE is not a supported operator.
5. Given the following SQL:
Which statement is incorrect?
A) The cursor declaration requires the WITH RETURN TO CLIENT clause in order to return a result set.
B) The cursor declaration requires the WITH RETURN clause in order to return a result set.
C) The procedure declaration requires the DYNAMIC RESULT SETS 1 clause in order to return a result set.
D) The cursor declaration requires the WITH RETURN TO CALLER clause in order to return a result set.
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: B | Question # 3 Answer: B | Question # 4 Answer: B | Question # 5 Answer: C |
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