在SQL中正确使用Pivot动态检索未在中显示的多行

我希望为特定透视表添加多行

表名：MasterTable

 FieldName | FieldValue | RowOrder
-----------------------------------
 Field1    | F1value1   | 0
 Field2    | F2value1   | 0
 Field3    | F3value1   | 0
 Field1    | F1value2   | 1
 Field2    | F2value2   | 1
 Field3    | F3value2   | 1

预期结果：

Field1     | Field2    | Field3  | RowOrder
--------------------------------------------
F1value1   | F2value1 | F3value1 | 0
F1value2   | F2value2 | F3value2 | 1

我试过这个密码

DECLARE @cols AS NVARCHAR(MAX),
        @query  AS NVARCHAR(MAX)

    select @cols = STUFF((SELECT distinct ',' + QUOTENAME(FieldName) from MasterTable where CatogoryId = @CatogoryId and CompanyId= @CompanyId FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,1,'')
    set @query = 'SELECT  ' + @cols + ' from (select FieldName, FieldValue,
                        row_number() over (partition by FieldName order by FieldName) as seqnum from MasterTable where 
                    CatogoryId =  ('+  CONVERT(varchar(max),@CatogoryId) +') and CompanyId = ('+  CONVERT(varchar(max),@CompanyId) +') ) x
                pivot 
                (
                    max(FieldValue)
                    for FieldName in (' + @cols + ')
                ) p '

    execute(@query)

我得到的输出是

Field1     | Field2    | Field3
---------------------------------
F1value1   | F2value2 | F3value1
F1value2   | F2value1 | F3value2

我发现显示值时出现问题。它显示出不同的秩序。第1列第1行显示“F1Value1”，第1列第2行显示“F1Value2”，但第2列第1行显示“F2Value2”，第2列第2行显示“F2Value1”。我需要所有的“Value1”作为第一行，“value2”作为第二行。为此，我还向表“RowOrder”添加了一个新字段，该字段将指定数据透视表的顺序。但我找不到解决办法。

---

请提供帮助

您可以将条件聚合用作

select rn,
       max(case when colname = 'Field1' then colvalue end) col1,
       max(case when colname = 'Field2' then colvalue end) col2,
       max(case when colname = 'Field3' then colvalue end) col3 
from
(
    values
   ('Field1', 'F1value1', 0),
   ('Field2', 'F2value1', 0),
   ('Field3', 'F3value1', 0),
   ('Field1', 'F1value2', 1),
   ('Field2', 'F2value2', 1),
   ('Field3', 'F3value2', 1)
) t(colname, colvalue, rn)
group by rn

返回：

+----+----------+----------+----------+
| rn |   col1   |   col2   |   col3   |
+----+----------+----------+----------+
|  1 | F1value1 | F2value1 | F3value1 |
|  2 | F1value2 | F2value2 | F3value2 |
+----+----------+----------+----------+

---

您可以使用条件聚合作为

select rn,
       max(case when colname = 'Field1' then colvalue end) col1,
       max(case when colname = 'Field2' then colvalue end) col2,
       max(case when colname = 'Field3' then colvalue end) col3 
from
(
    values
   ('Field1', 'F1value1', 0),
   ('Field2', 'F2value1', 0),
   ('Field3', 'F3value1', 0),
   ('Field1', 'F1value2', 1),
   ('Field2', 'F2value2', 1),
   ('Field3', 'F3value2', 1)
) t(colname, colvalue, rn)
group by rn

返回：

+----+----------+----------+----------+
| rn |   col1   |   col2   |   col3   |
+----+----------+----------+----------+
|  1 | F1value1 | F2value1 | F3value1 |
|  2 | F1value2 | F2value2 | F3value2 |
+----+----------+----------+----------+

您不需要任何seqnum。 请尝试以下操作：

DECLARE @cols AS NVARCHAR(MAX),
        @query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT distinct ',' + QUOTENAME(FieldName) from MasterTable where CatogoryId = @CatogoryId and CompanyId= @CompanyId FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,1,'')
set @query = 'SELECT  ' + @cols + ', RowOrder
                from 
                (
                    select FieldName, FieldValue, RowOrder
                    from MasterTable where 
                    CatogoryId =  ('+  CONVERT(varchar(max),@CatogoryId) +') and CompanyId = ('+  CONVERT(varchar(max),@CompanyId) +')
                ) x
                pivot 
                (
                    max(FieldValue)
                    for FieldName in (' + @cols + ')
                ) p '

execute(@query)

示例：

您不需要任何seqnum。 请尝试以下操作：

DECLARE @cols AS NVARCHAR(MAX),
        @query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT distinct ',' + QUOTENAME(FieldName) from MasterTable where CatogoryId = @CatogoryId and CompanyId= @CompanyId FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,1,'')
set @query = 'SELECT  ' + @cols + ', RowOrder
                from 
                (
                    select FieldName, FieldValue, RowOrder
                    from MasterTable where 
                    CatogoryId =  ('+  CONVERT(varchar(max),@CatogoryId) +') and CompanyId = ('+  CONVERT(varchar(max),@CompanyId) +')
                ) x
                pivot 
                (
                    max(FieldValue)
                    for FieldName in (' + @cols + ')
                ) p '

execute(@query)

---

示例：

它是动态值，因此我们无法预测每列中的值或可用行数。它是动态值，因此我们无法预测每列中的值或可用行数available@RoshmiAugustinegr8，总是乐于助人@罗斯姆奥古斯丁gr8，总是乐于助人！