我有一个"小" PIVOT SQL脚本的问题。我已将此当前解决方案基于Dynamic PIVOT的类似问题。
我已经成功编写了PIVOT脚本,但很大程度上还可以。但是,我的情况是这样,而不是将唯一条目放到单行上,脚本输出类似这样的内容
ListingEntryId Address Employees Location
1 NULL NULL Nottingham
1 Canal Street NULL NULL
1 NULL 3 NULL
2 NULL NULL London
2 Camden NULL NULL
2 NULL 12 NULL
而我正在寻找的结果应该是这样的
ListingEntryId Address Employees Location
1 Canal Street 3 Nottingham
2 Camden 12 London
这是脚本
DECLARE @listingId INT = 1;
DECLARE @cols AS NVARCHAR(MAX), @query AS NVARCHAR(MAX)
SELECT LEV.ListingColumnId, LEV.ListingEntryId, LE.CreatedBy, LEV.EntryValue, LD.ColumnTitle, LD.[Index]
INTO #ListingTable
FROM ListingEntryValue LEV LEFT OUTER JOIN
ListingEntry LE ON LEV.ListingEntryId=LE.Id
LEFT OUTER JOIN
ListingDefinition LD ON LEV.ListingColumnId = LD.Id
WHERE LE.ListingId = @listingId;
SELECT * FROM #ListingTable;
SELECT @cols = STUFF((SELECT DISTINCT TOP 100 PERCENT ',' + QUOTENAME(LT.ColumnTitle) FROM #ListingTable LT
FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1,1,'')
SELECT @cols;
SET @query = 'SELECT ListingEntryId,' + @cols + ' FROM (SELECT ListingEntryId, ListingColumnId, EntryValue, ColumnTitle, [Index] FROM #ListingTable LT) x
PIVOT (MAX(EntryValue) FOR ColumnTitle IN (' + @cols + ')
) p'
PRINT @query
EXECUTE(@query);
DROP TABLE #ListingTable
我会感激一些可以帮助我解决这个问题的建议。我已经制作了一个fiddle here,由于一些奇怪的原因,它不输出任何内容,但生成模式的所有代码都在那里
答案 0 :(得分:2)
将PIVOT中的字段限制为仅包含所需的元素(X,Y,值)
SET @query = 'SELECT ListingEntryId,' + @cols + ' FROM (SELECT ListingEntryId, EntryValue, ColumnTitle FROM #ListingTable LT) x
PIVOT (MAX(EntryValue) FOR ColumnTitle IN (' + @cols + ')
) p'
返回
ListingEntryId Address Employees Location
1 Canal Street 3 Nottingham
2 Camden 12 London