问题:单选题Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 5 4 5 2 5 5 Table T2: C1 C2 5 1 5 2 5 3 Which of the following queries will return only those rows that exist in T1 and not in T2?()A SELECT * FROM T1 MINUS SELECT * FROM T2B SELECT * FROM T1 EXCEPT SELECT * FROM T2C SELECT * FROM T2 UNION EXCEPT SELECT * FROM T1D SELECT * FROM T1 NOT EXISTS SELECT * FROM T2
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问题:单选题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'); END How can this function be used in an SQL statement?A SELECT TABLE(EMPLIST()) FROM EMPLOYEEB SELECT TABLE(EMPLIST()) AS t FROM EMPLOYEEC SELECT EMPLIST(id, firstname, lastname) FROM EMPLOYEED SELECT id, firstname, lastname FROM TABLE(EMPLIST()) AS t
问题:单选题Given the following stored procedure:CREATE PROCEDURE increase_salary ( IN p_workdept CHAR(6), OUT p_sum DECIMAL(9,2) ) SET p_sum = (SELECT SUM(salary) FROM employee WHERE workdept=p_workdept);How can this stored procedure be called from the Command Line Processor?()A CALL increase_salary('A00')B VALUES increase_salary('A00')C CALL increase_salary('A00', ?)D VALUES increase_salary('A00', ?)
问题:单选题Which of the following is the lowest cost DB2 product that can be legally installed on an AIX server?()A DB2 Express EditionB DB2 Personal EditionC DB2 Workgroup Server EditionD DB2 Enterprise Server Edition
问题:单选题Which kind of non-sourced UDF can be created so that it only returns a single value?()A RowB TableC ScalarD Column
问题:单选题Which of the following is NOT true about XML columns?()A Data can be retrieved by SQL.B Data can be retrieved by XQuery.C XML columns must be altered to accommodate additional parent and child relationships.D Access to any portion of an XML document can be direct, without reading the whole document.
问题:单选题Which of the following supports the XML data type?()A A unique indexB A composite indexC A check constraintD A generated column
问题:单选题Which of the following can be used to ensure that once a row has been inserted in table TABLEX, the column MAINID in that row cannot be updated?()A Define the column MAINID as NOT UPDATABLEB Define the column MAINID as a PRIMARY KEYC Define the column MAINID as a FOREIGN KEYD Define an UPDATE trigger on table TABLEX
问题:单选题Given the following table definitions: EMPLOYEE ID NAME DEPTID 01Smith 10 02Bossy 20 03 20 Peterson 04Goss 30 05Pape 40 06Avery 50 07O'Neal 60 08Carter 50 DEPARTMENT ID DEPTNAME 05 Hardware 10 Kitchen 20 Shoes 30 Toys 40 Electronics 50 Automotive and the following query: SELECT e.id, d.deptname FROM employee e, department d WHERE e.deptid = d.id AND e.id > 4 Which of the following queries will produce the same result set as the query above?()A SELECT e.id, d.deptname FROM employee e, department d WHERE e.id > 4B SELECT e.id, d.deptname FROM employee e INNER JOIN department d ON e.deptid = d.id WHERE e.id > 4C SELECT e.id, d.deptname FROM employee e FULL OUTER JOIN department d ON e.id = d.id WHERE e.id > 4D SELECT e.id, d.deptname FROM employee e LEFT OUTER JOIN department d ON e.deptid = d.id WHERE e.id > 4 UNION ALL SELECT e.id, d.deptname FROM employee e RIGHT OUTER JOIN department d ON e.deptid = d.id WHERE e.id > 4
问题:单选题Which of the following describes the objects of a DB2 database and their relationships?()A InstanceB Table spaceC System catalogD Schema repository
问题:单选题Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 1 4 1 3 1 2 Table T2: C1 C2 1 1 1 2 1 3 Which of the following queries will return only those rows that exist in both T1 and T2?()A SELECT * FROM t1 UNION SELECT * FROM t2B SELECT * FROM t1 UNION DISTINCT SELECT * FROM t2C SELECT * FROM t1 INTERSECT SELECT * FROM t2D SELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)
问题:单选题Which of the following describes how DB2 9 stores an XML document if the XML Extender is not used?()A CLOBB BLOBC HierarchicallyD Rows and columns
问题:单选题To which of the following resources can a lock be applied?()A RowB AliasC BitmapD Column
问题:单选题Given the following DDL and INSERT statements: CREATE VIEW v1 AS SELECT col1 FROM t1 WHERE col1 > 10; CREATE VIEW v2 AS SELECT col1 FROM v1 WITH CASCADED CHECK OPTION; CREATE VIEW v3 AS SELECT col1 FROM v2 WHERE col1 < 100; INSERT INTO v1 VALUES(5); INSERT INTO v2 VALUES(5); INSERT INTO v3 VALUES(20); INSERT INTO v3 VALUES(100); How many of these INSERT statements will be successful?()A 0B 1C 2D 3
问题:单选题Given the following two tables: TAB1 R1 A A A B B C C D E TAB2 R2 A A B B C C D Which of the following queries returns the following result set? RETVAL E()A SELECT r1 AS retval FROM tab1 INTERSECT SELECT r2 AS retval FROM tab2B SELECT r1 AS retval FROM tab1 EXCEPT SELECT r2 AS retval FROM tab2C SELECT DISTINCT r1 AS retval FROM tab1, tab2 WHERE r1 <> r2D SELECT r1 AS retval FROM tab1 UNION SELECT r2 AS retval FROM tab2
问题:单选题Which of the following DB2 data types has a fixed length?()A XMLB BLOBC DOUBLED DBCLOB
问题:单选题Which object may be used during query optimization to improve the performance for a subset of SELECT queries?()A MQTB TriggerC Read Only CursorD Stored Procedure
问题:单选题Which of the following best describes how locks are used in DB2?()A To maintain control of updated rows for commit processingB To ensure only committed changes are altered by another applicationC To allow two applications to update the same row of data simultaneouslyD To prevent multiple applications from accessing the same data simultaneously
问题:单选题Which of the following is TRUE for the DB2 isolation level Cursor Stability (CS)?()A An application process acquires at least a share lock on the current row of every cursor.B Any row that is read during a unit of work cannot be changed by other application processes until the unit of work is complete.C Any row changed by another application process can be read, even if the change has not been committed by that application process.D An application process that issues the same query more than once in a unit of work will not see additional rows caused by other application processes appending new information to the database.