使用 SQL Server 2000
表格1
ID Date Value1 Value2
001 01/01/2012 100 0
001 02/01/2012 200 200
...
...
001 31/01/2012 250 0
002 01/01/2012 050 100
002 02/01/2012 100 0
...
002 31/01/2012 075
....
我想按日期(日期列)按 id 分组显示值(value1 列)
输出如
ID 01/01/2012 02/01/2012 ... 31/01/2012
001 100 200 .... 250
002 050 100 .... 075
.....
询问
DECLARE @loop int,@date Date,@sql nvarchar(4000)
DECLARE @TempTable TABLE
(
[Date] DATE
)
INSERT INTO @TempTable SELECT DISTINCT [Date] FROM table1 ORDER BY [Date]
SET @sql = ''
SET @loop = 1
WHILE (@loop<=31)
BEGIN
IF EXISTS(SELECT * FROM @TempTable WHERE DAY([Date])=@loop)
BEGIN
SET @date = (SELECT [Date] FROM @TempTable WHERE DAY([Date])=@loop)
SET @sql = @sql+ ',MAX(CASE CONVERT(nvarchar(10),[Date],103) WHEN '''+CONVERT(nvarchar(10),@date,103)+''' THEN [Value1] END) AS [DATE'+CONVERT(nvarchar(2),@loop)+']'
END
ELSE
SET @sql = @sql+ ', NULL AS [DATE'+CONVERT(nvarchar(2),@loop)+']'
SET @loop = @loop+1
END
EXEC('SELECT ID'+@sql+' FROM table1 GROUP BY ID')
上面的查询正在工作,从上面的查询中我想找到星期天,如果是星期天,那么日期列应该显示 value2 列中的值,否则 value1 列应该显示
这该怎么做。
需要查询帮助