Question

我有一张像

这样的表格

    ID | TableID | FieldNames | Values
     1 |    1    | FirstName  | Value 1    
     2 |    1    | LastName   | Value 2    
     3 |    1    | City       | Value 3
     4 |    2    | FirstName  | Value 4    
     5 |    2    | LastName   | Value 5    
     6 |    2    | City       | Value 6

我需要在下面的网格中显示它

   TableID | FirstName | LastName | City
      1    |   Value1  |  Value2  | Value3
      2    |   Value4  |  Value5  | value6

我知道PIVOT的概念将有助于在MS SQL中实现这一点。但是我需要在Sybase中实现它。字段名称不固定。

Answer 1

进行三方自我加入：

SELECT t1.Value as FirstName, t2.Value as LastName, t3.Value as City 
FROM t t1, t t2, t t3 
WHERE t1.ID + 1 = t2.ID 
AND t1.ID +2 = t3.ID

Answer 2

在各种帖子的帮助下，我发现我可以使用动态案例陈述来做到这一点，如下所示。

    DECLARE @query VARCHAR(800)
    DECLARE @fieldName VARCHAR(255)
    DECLARE @LoopCounter INT, @MaxCount INT

    SET @query = 'select f.tableID,  '
    SET @fieldName = ''
    SET @LoopCounter = 1
    SET @MaxCount = (SELECT COUNT(DISTINCT FieldNames) FROM dbo.Table1)

    WHILE (@LoopCounter <= @MaxCount)
    BEGIN

        SET @fieldName = (SELECT FieldNames FROM dbo.table1 WHERE ID= @LoopCounter)
        SET @query = @query + ' max(case when f.FieldNames = ''' + @fieldName +''' then f.[Values] end) AS ''' + @fieldName + ''''

        IF(@LoopCounter < @MaxCount)
        BEGIN
            SET @query = @query + ', '
        END

        SET @LoopCounter = @LoopCounter + 1

    END

    SET @query = @query + ' FROM dbo.table1 f GROUP BY f.TableID'

    exec (@query)

在Sybase中将行值显示为列名，并使用另一列的值填充此行

2 个答案: