Sql server 为数据透视源排序数据

假设一个表键值具有属性，父表具有批次

LotId       SomeText
----------- --------
1           Hello
2           World

AttributeId LotId       Val      Kind
----------- ----------- -------- --------
1           1           Foo1     Kind1
2           1           Foo2     Kind2
3           2           Bar1     Kind1
4           2           Bar2     Kind2
5           2           Bar3     Kind3

我正在使用UNPIVOT-PIVOT操作以以下形式获取数据：

LotId       SomeText AttributeId LotId       Kind1Val Kind     AttributeId LotId       Kind2Val Kind     AttributeId LotId       Kind3Val Kind
----------- -------- ----------- ----------- -------- -------- ----------- ----------- -------- -------- ----------- ----------- -------- --------
1           Hello    1           1           Foo1     Kind1    2           1           Foo2     Kind2    NULL        NULL        NULL     NULL
2           World    3           2           Bar1     Kind1    4           2           Bar2     Kind2    5           2           Bar3     Kind3

如何选择与属性表的值无关的数据

错误结果的示例：

为什么?

因为Kind2文本位于Kind1列，Kind3位于Kind2列

因为KindX在Kind\u x列中，等等

为了得到正确的结果，我使用了掩码来预先安排作为PIVOT源的数据。没有面具怎么办

---

关于这个问题：

除非我在你的解释中遗漏了什么，否则你不需要属性掩码。如果最终列名只是原始列名，然后是种类值，则可以使用：

select *
from
(
    select LotId,
        SomeText,
        col+'_'+Kind col,
        value
    from
    (
        select l.LotId, 
            l.SomeText,
            cast(a.AttributeId as varchar(8)) attributeid,
            cast(a.LotId as varchar(8)) a_LotId,
            a.Val,
            a.Kind
        from @Lot l
        left join @Attribute a
            on l.LotId = a.LotId
    ) src
    cross apply
    (
        values ('attributeid', attributeid),('LotId', a_LotId), ('Value', Val), ('Kind', Kind)
    ) c (col, value)
) d
pivot
(
    max(value)
    for col in (attributeid_Kind1, LotId_Kind1, Value_Kind1, Kind_Kind1,
                attributeid_Kind2, LotId_Kind2, Value_Kind2, Kind_Kind2,
                attributeid_Kind3, LotId_Kind3, Value_Kind3, Kind_Kind3)
) piv;

看。结果如下：

| LOTID | SOMETEXT | ATTRIBUTEID_KIND1 | LOTID_KIND1 | VALUE_KIND1 | KIND_KIND1 | ATTRIBUTEID_KIND2 | LOTID_KIND2 | VALUE_KIND2 | KIND_KIND2 | ATTRIBUTEID_KIND3 | LOTID_KIND3 | VALUE_KIND3 | KIND_KIND3 |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     1 |  WithAll |                 1 |           1 |        Foo1 |      Kind1 |                 2 |           1 |        Foo2 |      Kind2 |                 3 |           1 |        Foo3 |      Kind3 |
|     2 |    Hello |            (null) |      (null) |      (null) |     (null) |                10 |           2 |        Bar2 |      Kind2 |            (null) |      (null) |      (null) |     (null) |
|     3 |    World |            (null) |      (null) |      (null) |     (null) |            (null) |      (null) |      (null) |     (null) |                12 |           3 |        Bar3 |      Kind3 |

---

有时候我在寻找一个问题，但我还有另一个挑战。我需要添加一些逻辑，比如CASE，那么这次外部应用是合理的吗@Tomasito请在新问题中发布新问题：我们开始

LotId       SomeText attributeid_Kind1 LotId_Kind1 Value_Kind1 Kind_Kind1 attributeid_Kind2 LotId_Kind2 Value_Kind2 Kind_Kind2 attributeid_Kind3 LotId_Kind3 Value_Kind3 Kind_Kind3
----------- -------- ----------------- ----------- ----------- ---------- ----------------- ----------- ----------- ---------- ----------------- ----------- ----------- ----------
1           WithAll  1                 1           Foo1        Kind1      2                 1           Foo2        Kind2      3                 1           Foo3        Kind3
2           Hello    NULL              NULL        NULL        NULL       10                2           Bar2        Kind2      NULL              NULL        NULL        NULL
3           World    NULL              NULL        NULL        NULL       NULL              NULL        NULL        NULL       12                3           Bar3        Kind3

DECLARE @Lot TABLE ( LotId INT PRIMARY KEY IDENTITY, SomeText VARCHAR(8)) INSERT INTO @Lot VALUES ('WithAll'), ('Hello'), ('World') DECLARE @Attribute TABLE( AttributeId INT PRIMARY KEY IDENTITY, LotId INT, Val VARCHAR(8), Kind VARCHAR(8)) INSERT INTO @Attribute VALUES (1, 'Foo1', 'Kind1'), (1, 'Foo2', 'Kind2'), (1, 'Foo3', 'Kind3'), (1, 'Foo4', 'Kind4'), (1, 'Foo5', 'Kind5'), (1, 'Foo6', 'Kind6'), (1, 'Foo7', 'Kind7'), (1, 'Foo8', 'Kind8'), (1, 'Foo9', 'Kind9'), (2, 'Bar2', 'Kind2'), (2, 'Bar1', 'Kind8'), (3, 'Bar3', 'Kind3') DECLARE @AttributesMask TABLE( Kind VARCHAR(8) ) INSERT INTO @AttributesMask VALUES('Kind1'), ('Kind2'), ('Kind3'), ('Kind4'), ('Kind5'), ('Kind6'), ('Kind7'), ('Kind8') select * from( select LotId, SomeText, --col+'_'+CAST(rn as varchar(10)) col, col+'_'+[Kind] col, value from ( select l.LotId, l.SomeText, cast(a.AttributeId as varchar(8)) attributeid, cast(a.LotId as varchar(8)) a_LotId, a.Val, a.Kind --, ROW_NUMBER() over(partition by l.[LotId] order by am.[Kind]) rn FROM @AttributesMask AS am LEFT join @Attribute a on [am].[Kind] = [a].[Kind] LEFT JOIN @Lot l ON [a].[LotId] = [l].[LotId] ) src cross apply ( values ('attributeid', attributeid),('LotId', a_LotId), ('Value', Val), ('Kind', Kind) ) c (col, value) ) d PIVOT (max(value) for col in ( attributeid_Kind1, LotId_Kind1, Value_Kind1, Kind_Kind1, attributeid_Kind2, LotId_Kind2, Value_Kind2, Kind_Kind2, attributeid_Kind3, LotId_Kind3, Value_Kind3, Kind_Kind3)) piv ORDER BY LotId

select *
from
(
    select LotId,
        SomeText,
        col+'_'+Kind col,
        value
    from
    (
        select l.LotId, 
            l.SomeText,
            cast(a.AttributeId as varchar(8)) attributeid,
            cast(a.LotId as varchar(8)) a_LotId,
            a.Val,
            a.Kind
        from @Lot l
        left join @Attribute a
            on l.LotId = a.LotId
    ) src
    cross apply
    (
        values ('attributeid', attributeid),('LotId', a_LotId), ('Value', Val), ('Kind', Kind)
    ) c (col, value)
) d
pivot
(
    max(value)
    for col in (attributeid_Kind1, LotId_Kind1, Value_Kind1, Kind_Kind1,
                attributeid_Kind2, LotId_Kind2, Value_Kind2, Kind_Kind2,
                attributeid_Kind3, LotId_Kind3, Value_Kind3, Kind_Kind3)
) piv;

| LOTID | SOMETEXT | ATTRIBUTEID_KIND1 | LOTID_KIND1 | VALUE_KIND1 | KIND_KIND1 | ATTRIBUTEID_KIND2 | LOTID_KIND2 | VALUE_KIND2 | KIND_KIND2 | ATTRIBUTEID_KIND3 | LOTID_KIND3 | VALUE_KIND3 | KIND_KIND3 |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     1 |  WithAll |                 1 |           1 |        Foo1 |      Kind1 |                 2 |           1 |        Foo2 |      Kind2 |                 3 |           1 |        Foo3 |      Kind3 |
|     2 |    Hello |            (null) |      (null) |      (null) |     (null) |                10 |           2 |        Bar2 |      Kind2 |            (null) |      (null) |      (null) |     (null) |
|     3 |    World |            (null) |      (null) |      (null) |     (null) |            (null) |      (null) |      (null) |     (null) |                12 |           3 |        Bar3 |      Kind3 |