Sql server 在SQL Server 2014中将(文本)行转换为列
我试图捕获特定组的行,然后将它们转换为命名脚本标题的列 这是一个数据示例:Sql server 在SQL Server 2014中将(文本)行转换为列,sql-server,tsql,pivot,sql-server-2014,dynamic-pivot,Sql Server,Tsql,Pivot,Sql Server 2014,Dynamic Pivot,我试图捕获特定组的行,然后将它们转换为命名脚本标题的列 这是一个数据示例: FORMULAS | INSTRUCTIONS ----------+---------------------------------------------------- AF100120 | **ACETALDEHYDE WARNING - USE APPROPRIATE CAUTION** AF100120 | ADD REMAINING ITEMS AF100120 | DISSOLVE ITEM
FORMULAS | INSTRUCTIONS
----------+----------------------------------------------------
AF100120 | **ACETALDEHYDE WARNING - USE APPROPRIATE CAUTION**
AF100120 | ADD REMAINING ITEMS
AF100120 | DISSOLVE ITEMS 1-2 IN 3
AF100120 | IF HEAT USED, COOL TO ROOM TEMPERATURE
AF100120 | MIX UNTIL HOMOGENEOUS
AF100120 | MIXING TIMES VARY WITH BATCH SIZE
AF100997 | 1) DISSOLVE THYMOL CRYSTALS IN ETHYL ALCOHOL. MIX WELL.
AF100997 | 2) ADD REMAINING ITEMS AND MIX UNTIL UNIFORM.
AF100997 | 3) FILTER IF NOT CLEAR
此脚本所需的输出为:
FORMULAS | INSTRUCTION #1 |INSTRUCTION #2 | INSTRUCTION #3 |INSTRUCTION #4 |INSTRUCTION #5|INSTRUCTION #6
AF100120 |**ACETALDEHYDE..| ADD REMAINING.| DISSOLVE ITEM. |IF HEAT USED.. |MIX UNTIL H |MIXING TIM...
AF100997 |1) DISSOLVE THYM| 2) ADD REMAINI| FILTER IF NOT | NULL |NULL |NULL
如果有人能帮我编写代码,我将不胜感激:
SELECT *
FROM
(SELECT
A.FormulaId AS FORMULAS,
CAST(B.Instruction AS NVARCHAR(100)) AS [INSTRUCTIONS]
FROM
Formulas AS A
LEFT JOIN
FormulaProcedures AS B ON A.FormulaId = B.FormulaId
WHERE
B.ProcedureType = 3
AND PhaseType = 2
AND YEAR(A.VersionDate) >= '2018'
AND A.PrimaryVersion = 1
AND A.FormulaId IN('AF100120', 'AF100997')
GROUP BY
A.FormulaId, CAST(B.Instruction AS NVARCHAR(100))
) AS SourceTable
PIVOT
(MAX([INSTRUCTIONS])
FOR [INSTRUCTIONS] IN ([INSTRUCTION #1], [INSTRUCTION #2],
[INSTRUCTION #3], [INSTRUCTION #4],
[INSTRUCTION #5], [INSTRUCTION #6])) AS PivotTable;
谢谢大家! 您可以使用动态透视,包括
行数()
函数,该函数的值按公式分组
按说明排序
列,以便在该分析函数的迭代过程中对列名进行编号:
DECLARE @cols AS NVARCHAR(MAX), @query AS NVARCHAR(MAX)
SELECT @cols =
STUFF((SELECT DISTINCT ',' + QUOTENAME(CONCAT('formulas',[rn])) AS formulas
FROM
(
SELECT f.*,
ROW_NUMBER() OVER
(PARTITION BY [formulas] ORDER BY [instructions]) AS rn
FROM [Formulas_Tab] f
) ff
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'');
SET @query =
N'SELECT *
FROM
(
SELECT f.*,
CONCAT(''formulas'',
ROW_NUMBER() OVER
(PARTITION BY [formulas] ORDER BY [instructions])) AS rn
FROM [Formulas_Tab] f
) ff
PIVOT
(
MAX([instructions]) FOR [rn] IN (' + @cols + N')
) p '
EXEC sp_executesql @query;
如果您安装的数据库版本是2017+,那么您将使用STRING\u AGG()
函数确定@cols
变量为
SELECT @cols =
SELECT STRING_AGG(QUOTENAME(CONCAT('formulas', [ rn ])), ',') AS formulas
FROM
(
SELECT DISTINCT ROW_NUMBER() OVER
( PARTITION BY [ formulas ] ORDER BY [ instructions ]) AS rn
FROM [ Formulas_Tab ] f
) ff
您可以使用动态透视,包括
行数()
函数,该函数的值按公式分组
按说明排序
列,以便在该分析函数的迭代过程中对列名进行编号:
DECLARE @cols AS NVARCHAR(MAX), @query AS NVARCHAR(MAX)
SELECT @cols =
STUFF((SELECT DISTINCT ',' + QUOTENAME(CONCAT('formulas',[rn])) AS formulas
FROM
(
SELECT f.*,
ROW_NUMBER() OVER
(PARTITION BY [formulas] ORDER BY [instructions]) AS rn
FROM [Formulas_Tab] f
) ff
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'');
SET @query =
N'SELECT *
FROM
(
SELECT f.*,
CONCAT(''formulas'',
ROW_NUMBER() OVER
(PARTITION BY [formulas] ORDER BY [instructions])) AS rn
FROM [Formulas_Tab] f
) ff
PIVOT
(
MAX([instructions]) FOR [rn] IN (' + @cols + N')
) p '
EXEC sp_executesql @query;
如果您安装的数据库版本是2017+,那么您将使用STRING\u AGG()
函数确定@cols
变量为
SELECT @cols =
SELECT STRING_AGG(QUOTENAME(CONCAT('formulas', [ rn ])), ',') AS formulas
FROM
(
SELECT DISTINCT ROW_NUMBER() OVER
( PARTITION BY [ formulas ] ORDER BY [ instructions ]) AS rn
FROM [ Formulas_Tab ] f
) ff
什么告诉我们秩序?例如,您的“AF100120”公式,我们如何知道说明的顺序?这将是解决方案的一个关键部分。FormulaProcedures表中有任何排序列吗?什么告诉我们顺序?例如,您的“AF100120”公式,我们如何知道说明的顺序?这将是解决方案的关键部分。FormulaProcedures表中是否有任何排序列?非常感谢@Barbados,这很有效。我可以添加更多的列,并用于数千条记录欢迎@GabrielMolina,当然可以,因为它是动态的。顺便说一句,NVARCHAR(最大)可容纳2GB(高达536.870.912个字符)非常感谢@Barbados,这很有效。我可以添加更多的列,并用于数千条记录欢迎@GabrielMolina,当然可以,因为它是动态的。顺便说一句,NVARCHAR(最大)容量为2GB(高达536.870.912个字符)