Question

我在SQL Server 2008中有一个如下表：

location       LOB               UnitName
----------     ---------         -------------------
Chennai         Health           UnitB
Mumbai          Health           UnitB
Pune            Health           UnitA,UnitB
Chennai         Motor            UnitB
Mumbai          Motor            UnitB
Pune            Motor            UnitB,UnitC
Trivandum       Motor            UnitC

我期待下面的结果..

Location       Health            Motor
---------      --------          --------
Chennai        UnitB             UnitB
Mumbai         UnitB             UnitB
Pune           UnitA,UnitB       UnitB,UnitC
Trivandum                        UnitC

我需要一个像这样显示的查询。任何人都可以帮助我实现这个目标吗？

Answer 1

试试这个：

SELECT DISTINCT location,
        ISNULL((SELECT UnitName FROM table_name t1 WHERE t1.location=t.location AND t1.LOB= 'Health'),'') AS Health,
        ISNULL((SELECT UnitName FROM table_name t2 WHERE t2.location=t.location AND t2.LOB= 'Motor'),'') AS Motor
FROM table_name t

Answer 2

要转动表格，您需要对轮播值使用聚合函数，而评论中的代码中缺少这些值。在您的情况下，您可以使用MAX()

SELECT * 
FROM(
    SELECT location, LOB, UnitName
    FROM @t
) AS t
PIVOT(
    MAX(UnitName)
    FOR LOB IN([Health], [Motor])
) AS pivotTable

对于动态列，请尝试以下操作：

DECLARE @DynamicPivotQuery AS NVARCHAR(MAX)
DECLARE @ColumnName AS NVARCHAR(MAX)
SELECT @ColumnName= ISNULL(@ColumnName + ',','') 
       + QUOTENAME(LOB)
FROM (SELECT DISTINCT LOB FROM @t) AS Courses

SET @DynamicPivotQuery = 

'SELECT * 
FROM(
    SELECT location, LOB, UnitName
    FROM @t
) AS t
PIVOT(
    MAX(UnitName)
    FOR LOB IN(' + @ColumnName + ')
) AS pivotTable
ORDER BY Location DESC'

EXEC sp_executesql @DynamicPivotQuery

Answer 3

我做的最简单的方法是以下查询：

    SELECT DISTINCT MAIN.location, ISNULL(HEALTH.UnitName, '') as [HEALTH], ISNULL(Motor.UnitName, '') as [Motor]
    FROM 
    (Select location from unitlocation ) AS MAIN 
    LEFT OUTER JOIN 
    (SELECT location, UnitName from unitlocation where LOB = 'Health') AS HEALTH ON MAIN.location = HEALTH.location 
    LEFT OUTER JOIN 
    (SELECT location, UnitName from unitlocation where LOB = 'Motor') AS Motor ON MAIN.location = Motor.location

以下是工作演示 CLICK HERE

DYNAMIC GENERATION

请为动态栏目找到工作演示：

DECLARE @cols VARCHAR(MAX)
;WITH CTE
AS
(
    SELECT
        ROW_NUMBER() OVER(PARTITION BY [LOB] ORDER BY [LOB]) AS RowNbr, 
        LOB,
        UNITNAME
    FROM
        unitlocation
)
SELECT @cols=STUFF
(
    (
        SELECT
            ',' +QUOTENAME([LOB])
        FROM
            CTE
        WHERE
            CTE.RowNbr=1
    FOR XML PATH('')
    )
,1,1,'')


DECLARE @query NVARCHAR(4000)=
N'SELECT
    *
FROM
(
    SELECT
        unitlocation.location,
        unitlocation.LOB,
        unitlocation.UnitName
    FROM
        unitlocation
) AS p
PIVOT
(
    MAX(UnitName)
    FOR LOB IN ('+@cols+')
) AS pvt'

EXECUTE(@query)

WORKING FIDDLE HERE

在sql server中作为列的行

3 个答案: