In a three-disk volume group, a disk was physically removed from the system without performing any software procedures to properly remove the disk. Which of the following commands should be performed to recover from this error?()
A.extendvg
B.cfgmgr
C.reducevg
D.varyoffvg
第1题:
A.RETRIEVE_LIST
B.RETRIEVE_GROUP
C.RETRIEVE_LIST_ITEM
D.RETRIEVE_GROUP_FROM_LIST
E.RETRIEVE_GROUP_FROM_LIST_ITEM
第2题:
A.POPULATE_LIST
B.POPULATE_GROUP
C.POPULATE_LIST_ITEM
D.POPULATE_LIST_FROM_GROUP
E.POPULATE_LIST_ITEM_FROM_GROUP
第3题:
对由SELECT--FROM—WHERE—GROUP--ORDER组成的SQL语句,其在被DBMS处理时,各子句的执行次序为()
A.SELECT—FROM—GROUP—WHERE—ORDER
B.FROM——SELECT--WHERE——GROUP——ORDER
C.FROM——WHERE——GROUP——SELECT——ORDER
D.SELECT——FROM——WHERE——GROUP——ORDER
第4题:
A.CREATE_GROUP
B.ADD_GROUP_NOW
C.POPULATE_GROUP
D.ADD_GROUP_COLUMN
E.CREATE_GROUP_FROM_QUERY
第5题:
若查询的结果仅限于平均分数超过80分的,则应( )。A.在GROUP子句的下一行加入:HAVING AVG(grade)>80B.在GROUP子句的上一行加入:HAVING AVG(grade)>80C.在FROM子句的下一行加入:HAVING AVG(grade)>80D.在FROM子句的上一行加入:HAVING AVG(grade)>80
第6题:
用括号中所给单词的正确形式填空 She realized she had more ________(physically) power than all the boys.