Consider this syntax：   MERGE INTO t1  USING t2 ON （join predicate）…..   What does the MERGE syntax do？（）

相似题目

• She agreed（）me on this issue.

  A . over B . on C . to D . with

  查看最佳答案

• This box is too heavy for me to carry upstairs. ——（）

  A . You may ask for help B . I’ll give you a hand C . Please do me a favor D . I’d come to hel

  查看最佳答案

• An administrator wants to delete an account object using the Database Cleanup utility.  Which of the following is the correct syntax to perform this task？（）

  A . dbclean -object account -type obsolete -db dbname -days daysold B . dbclean -table account -type obsolete -db dbname -days daysold C . dbclean -object organization -type account -db dbname -days daysold D . dbclean -object user -type account -db dbname -days daysold

  查看最佳答案

• This box is too heavy for me to carry it upstairs.（）

  A . You may ask for help. B . I'll give you a hand. C . Please do me a favor. D . I'd come to help.

  查看最佳答案

• Excuse me. Is this table taken?（）

  A . We haven‘t booked the dishes. B . We haven‘t ordered the dishes. C . Yeah. I‘m saving these seats for friends. D . Yeah. I‘m stuffed.

  查看最佳答案

• The man page for command shows the following syntax: The man page for command shows the following syntax: command [ -a -b ] Which of the following statements is true regarding this entry?（）

  A . Either the -a or flag -b may be used, but not both. B . If the flag -a is used then the flag -b also must be used. C . One of the -a or -b flags must be used, but not both at the same time. D . Both the flags may be used together, but neither are mandatory.

  查看最佳答案

• Consider this RMAN command：   RMAN> CONFIGURE RETENTION POLICY CLEAR；   What is the effect of this command？（）

  A . Backups will never expire. B . It removes any retention policy. C . The DELETE OBSOLETE command will fail with an error. D . It sets the retention policy to the default of REDUNDANCY 1.

  查看最佳答案

• Please prepare the medicine for me according to this（）

  A . prescription B . description C . inscription D . subscriptio

  查看最佳答案

• Consider the following argument: Gates does not work hard, because he is  rich. Which of the following suppressed premises could be added to this argument to make it valid?

  查看最佳答案

• Hiccu对爸爸说： Take this out on me, be made at me.句中be made at sb的意思是（  ）。

  查看最佳答案

• I___Professor Smith had taught me this question.

  查看最佳答案

• I think this is really the ideal college for me.

  查看最佳答案

• Please call me back ________ you see this message.

  查看最佳答案

• This kind of work is________me.

  A.unfamiliar with B.unfamiliar by C.unfamiliar to D.not unfamiliar of

  查看最佳答案

• This song reminds me（)France.A.of

  B.to C.with D.in

  查看最佳答案

• Mother ______ me ______ at half past six this morning.

  A．woke; up B．awake; up C．awaken; up

  查看最佳答案

• It is very（)（consider)of you to send me a birthday card.

  查看最佳答案

• I don’t like this hat．Please show me__________ ．

  A.another B.the other C.others D.both

  查看最佳答案

• Can you help me to ___ this mathematic problem？

  A、do out B、work out C、find out D、deal out

  查看最佳答案

• This is______for me to do.

  A．far too difficult a job B．too far difficult a job C．far too a difficult job D．too far a difficult job

  查看最佳答案

• This jacket is not （) for me. I need a bigger size.

  A．A.not enough B．B.smaller C．C.big enough

  查看最佳答案

• ____ you call me this morning？ （)

  A．Did B．Does C．Do D．Dos

  查看最佳答案

• Dear Paul,thank you so much for（） me this weekend.

  A．having B．have C．has D．had

  查看最佳答案

• Please call me back__ you see this message（）

  A．as well as B．as early as C．as far as D．as soon as

  查看最佳答案