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
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
关于SELECT...FROM...WHERE..查询子句描述正确的是。()
A. SELECT子句是从表中查询指定的列。
B. FROM子句是指定的表或视图。
C. WHERE子句是指定条件,限制显示的记录数据。
D. GROUP BY子句是对指定列中的数据进行分组
E. HAVING子句是对数据进行排序
在SELECT查询语句中,对指定列排序使用()语句。