Question

我有一个名为Table1的表，其中包含4列。

例如：

id   Field1   Field2   fIELD3
1    A        1        R1
2    A        1        R2
3    B        3        R21
4    A        1        R3
5    B        3        R44

我需要一个给我这个结果的查询

Field1   Field2 
A        1 
B        3

Answer 1

Select Distinct Field1, Field2 
from Table1

Answer 2

SELECT DISTINCT Field1,Field2 FROM TABLE_NAME

Answer 3

方法1：

SELECT Field1, Field2 
from Table1 
Group BY Field1, Field2

方法2：

Select Distinct Field1, Field2 
From Table1

方法3：

Select Field1, Field2 
From 
    (
      Select Field1, Field2,Row_NUmber() Over(Partition by  Field1, Field2 Order By Field1) AS RN
    ) AS T
 Where RN = 1

我需要SQL Server 2008 R2中的查询

3 个答案: