日期:2014-05-18  浏览次数:20479 次

查询一个月的数据,按天分组怎么查
表SDD
ID mmTime NO  
1 2012-1-11 12

2 2012-1-11 4

3 2012-1-15 27

4 2012-1-16 8

如何如下效果: 查询结果按天分组如下

1 2 3 .... 11 12 13 14 15 16 ...31 <------代表日期

  16 27 8 <------代表数量(每天的数量相加)

------解决方案--------------------
SQL code

SELECT * INTO #TRanen FROM (
SELECT 1 AS ID, CONVERT(DATETIME,'2012-1-11') AS mmTime,12 as [NO] UNION ALL
SELECT 2, '2012-1-11',4 UNION ALL
SELECT 3, '2012-1-15',27 UNION ALL
SELECT 4, '2012-1-16',8 
) T

DECLARE @SQL VARCHAR(500)
SELECT @SQL = ISNULL(@SQL + ',' ,'') + '[' + CONVERT(NVARCHAR(10),MMTIME,23)+']' 
FROM #TRanen GROUP BY CONVERT(NVARCHAR(10),MMTIME,23)

EXEC('
SELECT * FROM #TRanen A PIVOT (SUM([NO]) FOR MMTIME IN('+@SQL+')) B
')
DROP TABLE #TRanen

------解决方案--------------------
探讨
ID mmTime NO UType
1 2012-1-11 12 橘子

2 2012-1-11 4 橘子

3 2012-1-15 27 橘子

4 2012-1-16 8 橘子

5 2012-1-16 8 香蕉

如何如下效果: 查询结果按天分组如下

name 1 2 3 .... 11 12 13 14 15 16 ...31 <------代表日期

橘……

------解决方案--------------------
SQL code


IF OBJECT_ID(N'tempdb..#TRanen') IS NOT NULL
DROP TABLE #TRanen
GO

SELECT * INTO #TRanen FROM (
SELECT 1 AS ID, CONVERT(DATETIME,'2012-1-11') AS mmTime,12 as [NO] UNION ALL
SELECT 2, '2012-1-11',4 UNION ALL
SELECT 3, '2012-1-15',27 UNION ALL
SELECT 4, '2012-1-16',8 
) T
GO
DECLARE @SQL VARCHAR(500)
SELECT @SQL = ISNULL(@SQL + ',' ,'') + QUOTENAME(CONVERT(VARCHAR(10),MMTIME,120))
FROM (SELECT DISTINCT MMTIME = CONVERT(NVARCHAR(10),MMTIME,120) FROM #TRanen) AA
EXEC('
SELECT ID,'+@SQL+' FROM #TRanen A PIVOT (SUM([NO]) FOR MMTIME IN('+@SQL+')) B
')
DROP TABLE #TRanen


/*
ID    2012-01-11    2012-01-15    2012-01-16
1    12    NULL    NULL
2    4    NULL    NULL
3    NULL    27    NULL
4    NULL    NULL    8
*/