Question

我正在尝试构建一个查看具有三列的表的视图;建筑，车道，很多。我需要能够动态循环遍历表格，以便在一行中显示Building，Lane和Lot。

样品：

>Building       Lane     Lot
>   1           1001    56789
>   1           1002    12489
>   1           1002    37159
>   1           1002    71648
>   3           3001    27489
>   3           3001    67154
>   3           3002    47135
>   3           3003    84271
>   3           3003    96472
>   3           3003    94276

结果

>  Building Lane    Lots
>     1     1001    56789
>     1     1002    12489, 37159, 71648
>     3     3001    27489, 67154
>     3     3002    47135
>     3     3003    84271, 96472, 94276

我尝试了一个递归联盟，但收到一条消息，说我已超出最大数量100。我也尝试了一个循环，但它只是继续前进，并没有按照我的希望进行连接。到目前为止，表格中有一个建筑物在一条车道上有超过300个批次编号，而且可能会有更多的人。

Answer 1

看起来您正在寻找类似于以下脚本（see this SQL Fiddle example）的内容：

DECLARE @row TABLE (
    A VARCHAR(1),
    AA VARCHAR(1),
    B VARCHAR(4)
)

INSERT INTO @row VALUES(1,1,1001)
INSERT INTO @row VALUES(1,1,1002)
INSERT INTO @row VALUES(1,1,1003)
INSERT INTO @row VALUES(1,2,1001)
INSERT INTO @row VALUES(2,1,1001)
INSERT INTO @row VALUES(2,1,1002)
INSERT INTO @row VALUES(2,1,1003)
INSERT INTO @row VALUES(2,1,1004)
INSERT INTO @row VALUES(2,1,1005)
INSERT INTO @row VALUES(2,2,1001)
INSERT INTO @row VALUES(2,2,1002)
INSERT INTO @row VALUES(3,1,1001)

SELECT *
FROM @row

SELECT r1.A
    , r1.AA
    , STUFF((SELECT ', ' + r2.B AS [text()] 
    FROM @row r2
    WHERE r1.A = r2.A AND r1.AA = r2.AA
    ORDER BY r2.B 
    FOR XML PATH('')),1,1,'') AS "Row"
FROM @row r1
GROUP BY A, AA

因此，对于您的查询，它看起来像这样：

SELECT r1.Building
    , r1.Lane
    , STUFF((SELECT ', ' + r2.Lot AS [text()] 
    FROM YourTable r2
    WHERE r1.Building = r2.Building AND r1.Lane = r2.Lane
    ORDER BY r2.Lot
    FOR XML PATH('')),1,1,'') AS "Row"
FROM YourTable r1
GROUP BY Building, Lane

ReCursive / While循环

1 个答案: