IBM(000-730)章節(jié)練習(2019.03.21)

單項選擇題
Which of the following will begin a new unit of work?（）
A.The CONNECT statement
B.The first FETCH of a cursor
C.The BEGIN TRANSACTION statement
D.The first executable SQL statement
單項選擇題
A view is created with the following statement:CREATE VIEW v1 AS SELECT col1, col2, col3, col4 FROM t1 WHERE col4 > 1000 WITH CHECK OPTIONWhat is the effect of the CHECK OPTION clause?（）
A.Any row inserted or updated through view V1 must meet the condition that col4 > 1000.
B.From now on, any row inserted or updated in table T1 must meet the condition that col4 > 1000, but existing rows in the table are not checked.
C.At view creation, DB2 will check the data in table T1, and if in any row doesn't meet the condition col4 > 1000, the view creation will be rejected.
D.Any row inserted or updated through view V1 must meet the condition that col4 > 1000 and no row in table T1 can be updated such that col4 <= 1000, but new rows in the table can be inserted with col4 <= 1000.
單項選擇題
Which of the following DB2 products are required on an iSeries or System i server to enable an application running on that server to retrieve data from a DB2 database on a Linux server?（）
A.DB2 for i5/OS
B.DB2 Runtime Client
C.DB2 Connect Enterprise Edition
D.DB2 for i5/OS SQL Development Kit
單項選擇題
Given the following function:CREATE FUNCTION emplist () RETURNS TABLE ( id CHAR(6) , firstname VARCHAR(12) , lastname VARCHAR(15) ) LANGUAGE SQL BEGIN ATOMIC RETURN SELECT EMPNO, FIRSTNME, LASTNAME FROM EMPLOYEE WHERE WORKDEPT IN ('A00', 'B00'); ENDHow can this function be used in an SQL statement?
A.SELECT TABLE(EMPLIST()) FROM EMPLOYEE
B.SELECT TABLE(EMPLIST()) AS t FROM EMPLOYEE
C.SELECT EMPLIST(id, firstname, lastname) FROM EMPLOYEE
D.SELECT id, firstname, lastname FROM TABLE(EMPLIST()) AS t
單項選擇題
A DBA has been asked to create a table which will contain a substantial amount of detailed sales information for each calendar month and maintain it to contain only the last 12 months. Which of the following methods will facilitate the online removal of the oldest month’s data?（）
A.Create an MQT that selects the oldest month of data with the REFRESH IMMEDIATE option.
B.Create 12 separate tables, create a view based on all 12, drop the table with the oldest month's data then drop and re- create the view.
C.Create a range partitioned table, partitioned by month, and use the ALTER TABLE statement to detach the oldest month and attach storage for new data.
D.Create a single table, extract the data to be retained using UNLOAD with a SELECT statement, drop and re-create the table then load only the data to be retained.
單項選擇題
A user needs to create a trigger that will update table T2 whenever a row is added to table T1. Assuming the user has all appropriate privileges for table T2, which privilege is required on table T1 to create the trigger?（）
A.REFERENCES
B.SELECT
C.UPDATE
D.ALTER
單項選擇題
Application A currently holds an exclusive lock on a single row and application B tries to access that row. If lock timeout is set to -1 and both applications are using isolation level RS, which of the following will occur?（）
A.Applications A and B will cause a deadlock situation
B.Application B will read the previous version of the row
C.Application B will read the row and see uncommitted changes made by application A
D.Application B will be placed in a lock-wait state until application A releases its lock
單項選擇題
Which of the following scenarios will ensure that the value of the NEXT_STEPNO column in a given row of table TABLEX exists as a value of column STEPNO (usually in another row) in the same table?（）
A.Define a UNIQUE constraint on the columns NEXT_STEPNO and STEPNO.
B.Define a CHECK constraint on the NEXT_STEPNO column (NEXT_STEPNO = STEPNO).
C.Define column STEPNO as the primary key of TABLEX and column NEXT_STEPNO as a foreign key referencing column STEPNO of the same table.
D.Define column NEXT_STEPNO as the primary key of TABLEX and column STEPNO as a foreign key referencing column NEXT_STEPNO in the same table.
單項選擇題
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.4
B.3
C.1
D.0
單項選擇題
The opening of cursor CSR01 produces the following result set:STUDENT LASTNM FIRSTNM CLASSNO 123 Brown John T100 213 Bailey JamesT100 312 Carter Arlene T210 465 Chas Devon T305 546 Davis Steven T405If this Fetch statement is executed: FETCH csr01 INTO :studnum, :firstname, :lastname, :class Which of the following DELETE statements will cause this row to be deleted?（）
A.DELETE ALL FROM tab01 FOR CURRENT OF csr01
B.DELETE FROM tab01 FOR CURRENT csr01 WITH RS
C.DELETE * FROM tab01 WHERE CURRENT csr01 WITH CS
D.DELETE FROM tab01 WHERE CURRENT OF csr01 WITH RR

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