Consider this syntax： MERGE INTO t1 USING t2 ON （join predicate）….. What does the MERGE syntax do？（）A、It performs a merge join of the row from T2 only if it doesn’t exist in the T1 table. B、It creates a natural join of tables T1 and T2 for all colum

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

A、It performs a merge join of the row from T2 only if it doesn’t exist in the T1 table.
B、It creates a natural join of tables T1 and T2 for all columns that have the same name.
C、It creates a Cartesian product of table T1 and table T2 for all columns that have the same name.
D、For each row from T2, it updates the row if it exists within table T1, otherwise it inserts the row into T1.

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相似问题和答案

第1题：

3．Why not_________your position?

A． considering changing

B． considering to change

C． consider change

D． consider changing

正确答案：D
3．D【解析】why not+do表建议，consider后接动词一 ing形式作宾语。

第2题：

People()foxes()clever but sly animals.

A. consider…to be

B. consider…as

C. Consider…X

参考答案：B

第3题：

在Python3下输入100000000L，会得到()

A.100000000L

B.100000000

C.Syntax Error:invalidsyntax

D.1e8

正确答案：C

第4题：

指令

A.EXECUTED

B.ORDERED

C.SYNTAX FAULT

D.UNREASONABLE VALUE

参考答案：D

第5题：

A locutionary act is the act of conveying literal meaning by means of syntax, lexicon, and phonology.()

参考答案：正确

第6题：

Syntax is defined as the study of the internal structure and the formation of words.()

参考答案：错误

第7题：

( ) studies the ways words are combined to form. sentences in a language ./font

A、Phonetics

B、Phonology

C、Morphology

D、Syntax

参考答案：D

第8题：

［A］ confirm ［B］ confer ［C］ consult ［D］ consider

正确答案：C

本题考查形近动词辨析。空格所在部分是because引导的状语从句，解释上文“先父们的立法机构拥有行使权利所必须的宗教特质”的原因。confirm意为“确定，批准，证实”；confer意为“授予”；consult意为“咨询，请教”；consider意为“考虑”。根据句意，应选［C］，表示“向神寻求建议或启示”。

第9题：

若串S=’syntax’,其字串的数目是( )。

A、6

B、21

C、22

D、7

正确答案: C

第10题：

Consider the following statement on a RANGE partitioned table: ALTER TABLE orders DROP PARTITION p1, p3;What is the outcome of executing the above statement?()

A.A syntax error will result as you cannot specify more than one partition in the same statement

B.All data in p1 and p3 partitions are removed and the table definition is changed

C.All data in p1 and p3 partitions are removed, but the table definition remains unchanged

D.Only the first partition (p1) will be dropped as only one can be dropped at any time

参考答案：B

Consider this syntax：

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