如何在SQL Server中顯示沒有重複的記錄

Question

有誰知道我該如何顯示在SQL Server結果中沒有重複記錄的記錄？

Answer 1

使用不同

SELECT DISTINCT * FROM table

或者使用GROUP BY

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

Answer 2

如果你真的意味着 「記錄中沒有重複的記錄」，即每隔一行存在一次，只有一次，試試這個：

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

Answer 3

該問題的另一種解釋。

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 
     )