sql - sql交叉表问题

Question

这是非常详细的问题：此日期仅属于 1 个表

客户代码地址
cust1 国会大厦，宿务市
cust1 代 maxilom, 宿务市
cust1 瓜达卢佩, 宿务市
cust2 paknaan，曼达维市
cust2 basak, 曼达维市
cust3 拉普拉普市

在我的报告中，我想在我的报告查看器中有这个字段

客户名称 location1 location2 location3
cust1 国会大厦，宿务市将军。maxilom, 宿务市 瓜达卢佩, 宿务市
cust2 paknaan, mandaue basak, mandaue lapu-lapu city

请帮忙..

Answer 1

如果您有一个未向我们展示的位置字段，可以区分每列的含义

SELECT 
custcode, 
MAX(CASE WHEN location = 1 THEN address END) AS location1,
MAX(CASE WHEN location = 2 THEN address END) AS location2,
MAX(CASE WHEN location = 3 THEN address END) AS location3
FROM X
GROUP BY custcode

如果您依赖行排序 SQL Server 特定答案。

这假设您有一个 ID 字段，可以从中计算“第一”行的顺序。

with X as
(
SELECT 1 AS ID, 'cust1' AS  custcode, 'capitol, cebu city' AS address 
UNION ALL
SELECT 2 AS ID,  'cust1' AS  custcode, 'gen. maxilom, cebu city' AS address 
UNION ALL
SELECT 3 AS ID,  'cust1' AS  custcode, 'guadalupe, cebu city' AS address 
UNION ALL
SELECT 4 AS ID,  'cust2' AS  custcode, 'paknaan, mandaue city' AS address 
UNION ALL
SELECT 5 AS ID,  'cust2' AS  custcode, 'basak, mandaue city' AS address 
UNION ALL
SELECT 6 AS ID,  'cust2' AS  custcode, 'lapu-lapu city'
)
, Y AS
(
SELECT ROW_NUMBER() OVER (PARTITION BY custcode ORDER BY ID) AS RN, 
       custcode,
       address 
FROM X
)

SELECT custcode, [1] AS location1 , [2] AS location2,[3] AS location3 FROM Y
PIVOT  
(  
Max(address)  
FOR RN IN ([1], [2],[3])  
) AS PivotTable;