Question

有谁知道如何在SQL Server中显示结果不重复的记录？

Answer 1

使用不同的

SELECT DISTINCT * FROM table

或者按

使用分组

select field1,field2,field3 FROM table GROUP BY field1, field2, field3

Answer 2

如果您的确意味着“ 记录没有重复记录 ”，即每一行只存在一次，请尝试以下方法：

  Select * From Table
  Group By [Here list all columns in Table]
  Having Count(*) = 1

Answer 3

对这个问题的另一种解释。

SELECT *
FROM   yourtable t1
WHERE  NOT EXISTS
       (SELECT *
       FROM    yourtable t2
       WHERE   t1.col_to_match_for_duplicates=t2.col_to_match_for_duplicates
       AND     t1.primarykey                <> t2.primarykey
       )

如何在SQL Server中显示没有重复的记录

3 个答案: