Question

列

+--------------------------+
|      inv_num       scn   |
+--------------------------+
|     MI1001        160008 |
|     CI1002        160008 |
|     VI1003        160008 |
+--------------------------+

MI 适用于其他商品， CI 适用于货物， VI 适用于货船。

我需要sql结果显示为

+------------------------------------------------+
|     scn           Misc       Cargo      Vessel |
+------------------------------------------------+
|     160008        MI1001     CI1002     VI1003 |
+------------------------------------------------+

我是这类新手，所以不确定如何进行查询。

Answer 1

我会用条件聚合来做到这一点：

select scn,
       max(case when inv_num like 'MI%' then inv_num end) as Misc,
       max(case when inv_num like 'CI%' then inv_num end) as Cargo,
       max(case when inv_num like 'VI%' then inv_num end) as Vessel
from t
group by scn;

Answer 2

使用Pivot也可以实现

示例数据

Declare @Table1 TABLE 
    (inv_num varchar(6), scn int)
;

INSERT INTO @Table1
    (inv_num, scn)
VALUES
    ('MI1001', 160008),
    ('CI1002', 160008),
    ('VI1003', 160008)
;

脚本

Select scn,[1] AS Misc,[2] As Cargo,[3] As Vessel  from (
select 
inv_num, 
scn,
ROW_NUMBER()OVER(PARTITION BY scn ORDER BY (SELECT NULL))RN 
        from @Table1)T
PIVOT (MAX(inv_num) FOR RN IN ([1],[2],[3]))PVT

如何将数据分成不同的列sql？

2 个答案: