我想在T-SQL

Question

上面是输入表。 我试图将所有childsku产品与其计数及其关联的父sku一起放在一行中。但它没有按预期工作

         select [Parent SKU (PartNo) ],count([Child SKU]),[Child SKU] 
from tbl_name
       group by [Parent SKU (PartNo) ],[Child SKU]

现在我希望所需的输出如下：

Answer 1

使用STUFF。

<强>查询

SELECT t.ParentSKU, COUNT(t.ChildSKU) as Total,
STUFF((
    SELECT ',' + ChildSKU
    FROM tbl_name 
    WHERE ParentSKU = t.ParentSKU
    FOR XML PATH('')
), 1, 1, '') AS ChildSKU
FROM tbl_name t
GROUP BY ParentSKU;

Demo

Answer 2

您可以使用STUFF;

测试数据;

IF OBJECT_ID('tempdb..#TestData') IS NOT NULL DROP TABLE #TestData
GO
CREATE TABLE #TestData (ChildSKU varchar(10), ParentSKU varchar(10))
INSERT INTO #TestData (ChildSKU, ParentSKU)
VALUES
('B001L','B001')
,('B001M','B001')
,('B001S','B001')
,('B001XL','B001')

查询;

SELECT 
a.ParentSKU
,COUNT(ChildSKU) ChildTotal
,STUFF((SELECT ', ' + ChildSKU
           FROM #TestData b 
           WHERE b.ParentSKU = a.ParentSKU 
          FOR XML PATH('')), 1, 2, '') AS ChildSKU
FROM #TestData a
GROUP BY ParentSKU

将结果作为;

ParentSKU   ChildTotal  ChildSKU
B001        4           B001L, B001M, B001S, B001XL