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IBM DB2 9 Family Fundamentals Sample Questions:

1. If the following SQL statements are executed in the order shown:
CREATE TABLE orders (order_num INTEGER NOT NULL, buyer_name VARCHAR(35), amount NUMERIC(5,2));
CREATE UNIQUE INDEX idx_orderno ON orders (order_num);
Which of the following describes the resulting behavior?

A) Every ORDER_NUM value entered must be unique; no other index can be created for the ORDERS table that reference the ORDER_NUM column
B) Every ORDER_NUM value entered must be unique; whenever the ORDERS table is queried rows should be displayed in order of increasing ORDER_NUM values
C) Duplicate ORDER_NUM values are allowed; no other index can be created for the ORDERS table that reference the ORDER_NUM column
D) Every ORDER_NUM value entered must be unique; whenever the ORDERS table is queried rows will be displayed in no particular order

2. An application needs a table for each connection that tracks the ID and Name of all items previously ordered and committed within the connection. The table also needs to be cleaned up and automatically removed each time a connection is ended. Assuming the ITEMS table was created with the following SQL statement:
CREATE TABLE items item_no INT, item_name CHAR(5), item_qty INT)
Which of the following SQL statements will provide the table definition that meets the specified requirements?

A) DECLARE GLOBAL TEMPORARY TABLE tracker AS (SELECT item_no, item_name FROM items) WITH NO DATA ON COMMIT PRESERVE ROWS ON DISCONNECT DROP TABLE
B) CREATE TABLE tracker AS (SELECT item_num, item_name FROM items) ON COMMIT PRESERVE ROWS ON DISCONNECT DROP TABLE
C) CREATE TABLEsystmp.tracker AS (SELECT item_num, item_name FROM items) WITH NO DATA ON COMMIT PRESERVE ROWS
D) DECLARE GLOBAL TEMPORARY TABLE tracker AS (SELECT item_no, item_name FROM items) WITH NO DATA ON COMMIT PRESERVE ROWS

3. Which of the following is true about XML columns?

A) In order to access any portion of an XML document stored in an XML column, the entire document must be retrieved
B) OnlyXQuery can be used to retrieve an XML document from an XML column
C) XML columns must be altered to accommodate additional parent/child relationships if they are used in referential constraints
D) XML columns are used to store XML documents as a hierarchical set of entities

4. Which of the following tools for DB2 V9 allows a user to create and debug a SQL stored procedure?

A) Stored Procedure Builder Security
B) Development Center
C) Control Center
D) Developer Workbench

5. The following statements:
CREATE TABLE t1 (col1 INT NOT NULL, PRIMARY KEY (col1));
CREATE TABLE t2 (col1 INT NOT NULL, col2 CHAR(1) NOT NULL, PRIMARY KEY (col1, col2),
FOREIGN KEY (col1) REFERENCES t1 (col1)
ON DELETE CASCADE ON UPDATE RESTRICT);
CREATE TABLE t3 (col1 INT NOT NULL, col2 INT NOT NULL, PRIMARY KEY (col1, col2),
FOREIGN KEY (col1) REFERENCES t1 (col1)
ON DELETE NO ACTION ON UPDATE RESTRICT);
INSERT INTO t1 VALUES (1), (2);
INSERT INTO t2 VALUES (1, 'a'), (1, 'b'), (2,'c');
INSERT INTO t3 VALUES (1, 100), (2, 200), (2,300);
How many rows will be deleted by the following DELETE statement? DELETE FROM t1 WHERE
col1 = 1;

A) 3
B) 1
C) 4
D) 0

Solutions: