SQL 带枢轴的服务器子查询

Question

Chromosome  Locus       Variant_A   Variant_B   Variant Strain_ID   Family  Parent1_Name    Parent1_Marker  Parent2_Name    Parent2_Marker  Line    Marker  Gid
----------------------------------------------------------------------------------------------------------------------------------------------------------------
Gm09        40907915    G           A           GA      DS11.46096  46      IA3023          AA              PI507.681B*     BB              96      BB      2
Gm09        422384      G           A           GA      DS11.46096  46      IA3023          AA              PI507.681B*     BB              96      AA      4
Gm09        422720      A           G           AG      DS11.46096  46      IA3023          BB              PI507.681B*     AA              96      BB      5
Gm09        424439      C           A           CA      DS11.46096  46      IA3023          AA              PI507.681B*     BB              96      AA      7
Gm09        425375      G           T           GT      DS11.46096  46      IA3023          AA              PI507.681B*     BB              96      AA      9
Gm09        425581      T           C           TC      DS11.46096  46      IA3023          BB              PI507.681B*     AA              96      BB      10
Gm09        43921862    C           A           CA      DS11.46096  46      IA3023          BB              PI507.681B*     AA              96      AA      12

这是我的table。我需要这个输出：

| Strain     |           | Gm09_40907915 | Gm09_422384 | Gm09_422720 | Gm09_424439 |    |
| DS11.46096 | Variant_A | G             | G           | A           | C           |    |
| DS11.46096 | Variant_B | A             | A           | G           | A           |    |
| DS11.46096 | Variant   | GA            | GA          | AG          |        CA    |  |

+------------+------------+------------+--- ----------+------------+---------

当我使用此代码时：

use nam13;

DECLARE @cols NVARCHAR (MAX)

SELECT @cols = COALESCE (@cols + ',[' + ChrLocus + ']', '[' + ChrLocus + ']')
           FROM    
           (
                 SELECT DISTINCT Chromosome+'_'+ CAST(Locus AS VARCHAR(10))ChrLocus 
                 FROM genotypeQA 
           ) PV 
           ORDER BY ChrLocus

现在调整结果。我已经在查询中编写了逻辑

DECLARE @query NVARCHAR(MAX)

SET @query = (SELECT *
         FROM 
         (  -- Source data for pivoting
            SELECT Chromosome+'_'+ CAST(Locus AS    VARCHAR(10))ChrLocus,Strain_ID,
            Variants,COLNAMES 
            FROM genotypeQA
            CROSS APPLY(VALUES (Variant_A,'Variant_A'),(Variant_B,'Variant_B'),(Variant,'Variant'))
            AS COLUMNNAMES(Variants,COLNAMES)) x

         PIVOT 
         (
             --Defines the values in each dynamic columns
             MIN (Variants)

             -- Get the names from the @cols variable to show as column

             FOR ChrLocus IN (['+ @cols +'])
        ) p            
    );

EXEC SP_EXECUTESQL @query

我在 SQL 服务器中收到以下错误：

Msg 116, Level 16, State 1, Line 36
Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.

Answer 1

由于您正在动态构建查询，因此您希望将 @query 用作字符串并将 @cols 注入其中。

我也会对查询做一些小改动（以使变体类型正确），下面的查询应该会为您提供所需的输出：

DECLARE @cols NVARCHAR (MAX)
SELECT @cols = COALESCE (@cols + ',[' + ChrLocus + ']', '[' + ChrLocus + ']')
FROM    
(
        SELECT DISTINCT Chromosome+'_'+ CAST(Locus AS VARCHAR(10))ChrLocus 
        FROM genotypeQA 
) PV 
ORDER BY ChrLocus

DECLARE @query NVARCHAR(MAX)
SET @query = 'SELECT Strain_ID, COLNAMES as Variants, ' + @cols + '
    FROM 
         (  -- Source data for pivoting
            SELECT CONCAT(Chromosome,''_'',Locus) ChrLocus,Strain_ID,
            Variants, COLNAMES, sort
            FROM genotypeQA
            CROSS APPLY(VALUES (1, Variant_A,''Variant_A''),(2, Variant_B,''Variant_B''),(3, Variant,''Variant''))
            AS COLUMNNAMES(Sort, Variants,COLNAMES)
          ) x

         PIVOT 
         (
             --Defines the values in each dynamic columns
             min (Variants)

             -- Get the names from the @cols variable to show as column

             FOR ChrLocus IN ('+ @cols +')
        ) p 
       order by strain_id, sort
    ;'

--print @query
EXEC SP_EXECUTESQL @query

输出将是：

Strain_ID  Variants  Gm09_40907915 Gm09_422384 Gm09_422720 Gm09_424439 Gm09_425375 Gm09_425581 Gm09_43921862
---------- --------- ------------- ----------- ----------- ----------- ----------- ----------- -------------
DS11.46096 Variant_A G             G           A           C           G           T           C 
DS11.46096 Variant_B A             A           G           A           T           C           A 
DS11.46096 Variant   GA            GA          AG          CA          GT          TC          CA

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