题目内容

3 The author writes this letter to ____________.

A. express gratitude
B. say hello
C. inform some news
D. invite his / her friend to attend a ceremony

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4 The author’s friend is more likely to be a _________ to the author.

A. common friend
B. soul mate
C. sister
D. family member

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5 According to the text, which one is NOT correct?

A. The author’s friend helped the author a lot.
B. The author and his / her friend went through many difficulties.
C. The author and his / her friend did not go to the same college.
D. The author and his / her friend live together now.

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为了去除查询结果集中的重复行，可以在SELECT语句中使用哪一个关键字（）？

All
B. Distinct
C. Update
D. Merge

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在SELECT语句中，HAVING子句的作用是（）。

A. 查询结果的分组条件
B. 组的筛选条件
C. 对查询结果集进行排序
D. 限定返回行的判断条件

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3 The author writes this letter to ____________.

A. express gratitude B. say hello C. inform some news D. invite his / her friend to attend a ceremony

4 The author’s friend is more likely to be a _________ to the author.

5 According to the text, which one is NOT correct?

为了去除查询结果集中的重复行，可以在SELECT语句中使用哪一个关键字（ ）？

在SELECT语句中，HAVING子句的作用是（ ）。

A. express gratitude
B. say hello
C. inform some news
D. invite his / her friend to attend a ceremony

为了去除查询结果集中的重复行，可以在SELECT语句中使用哪一个关键字（）？

在SELECT语句中，HAVING子句的作用是（）。