仅显示Microsoft SQL Server组中的第一行

我希望始终只选择ID2中最低的数字，并按ID1分组

表:

| ID1 | ID2 |  Name  | Phone |
|  1  |  1  | Max    |  123  |
|  1  |  2  | Ben    |  254  |
|  1  |  3  | Robert |  541  |
|  2  |  1  | Andy   |  515  |
|  2  |  2  | Carl   |  631  |

这是我想要的输出：

| ID1 |  Name   | Phone |
|  1  |  Max    |  123  |
|  2  |  Andy   |  515  |

---

有人能帮我正确查询microsoft sql server吗…？

您可以使用CTE和排序功能，如

行数

：

WITH CTE AS
(
    SELECT ID1, ID2,  Name, Phone,
           RN = ROW_NUMBER() OVER (PARTITION BY ID1 ORDER BY ID2 ASC)
    FROM dbo.TableName
)
SELECT ID1, ID2,  Name, Phone 
FROM CTE WHERE RN = 1

---

您可以使用CTE和排序功能，如

行数

：

WITH CTE AS
(
    SELECT ID1, ID2,  Name, Phone,
           RN = ROW_NUMBER() OVER (PARTITION BY ID1 ORDER BY ID2 ASC)
    FROM dbo.TableName
)
SELECT ID1, ID2,  Name, Phone 
FROM CTE WHERE RN = 1

---

您可以使用CTE和排序功能，如

行数

：

WITH CTE AS
(
    SELECT ID1, ID2,  Name, Phone,
           RN = ROW_NUMBER() OVER (PARTITION BY ID1 ORDER BY ID2 ASC)
    FROM dbo.TableName
)
SELECT ID1, ID2,  Name, Phone 
FROM CTE WHERE RN = 1

---

您可以使用CTE和排序功能，如

行数

：

WITH CTE AS
(
    SELECT ID1, ID2,  Name, Phone,
           RN = ROW_NUMBER() OVER (PARTITION BY ID1 ORDER BY ID2 ASC)
    FROM dbo.TableName
)
SELECT ID1, ID2,  Name, Phone 
FROM CTE WHERE RN = 1