Sql 如何按列显示数据
如何按列显示日期 表1Sql 如何按列显示数据,sql,sql-server,sql-server-2000,Sql,Sql Server,Sql Server 2000,如何按列显示日期 表1 ID Date Value 001 01/01/2012 100 001 02/01/2012 200 ... ... 001 31/01/2012 250 002 01/01/2012 050 002 02/01/2012 100 ... 002 31/01/2012 075 .... 我想按日期按行显示值按id按行分组riw 预期产量 ID 01/01/2012 02/01/2012 ... 31/01/2012 001 100 200 .... 250 00
ID Date Value
001 01/01/2012 100
001 02/01/2012 200
...
...
001 31/01/2012 250
002 01/01/2012 050
002 02/01/2012 100
...
002 31/01/2012 075
....
我想按日期按行显示值按id按行分组riw
预期产量
ID 01/01/2012 02/01/2012 ... 31/01/2012
001 100 200 .... 250
002 050 100 .... 075
.....
如何使用SQL查询执行此操作?试试这个
DECLARE @cols NVARCHAR(2000)
DECLARE @query NVARCHAR(4000)
SELECT @cols = STUFF(( SELECT DISTINCT
'],[' + `Date`
FROM Table1
ORDER BY '],[' + `Date` FOR XML PATH('')
), 1, 2, '') + ']';
SET @query = N'SELECT ID, '+
@cols +'
FROM
(SELECT ID
FROM Table1
PIVOT
(
SUM([`Value`])
FOR `Date` IN
( '+
@cols +' )
) AS pvt
ORDER BY ID;'
EXECUTE(@query)
SQL2000版本
DECLARE @date Date,@sql nvarchar(MAX)
DECLARE date_cursor CURSOR
FOR SELECT DISTINCT [Date] FROM table_one ORDER BY [Date]
SET @sql = ''
OPEN date_cursor
FETCH NEXT FROM date_cursor INTO @date
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql = @sql+ ',MAX(CASE CONVERT(nvarchar(10),[Date],103) WHEN '''+CONVERT(nvarchar(10),@date,103)+''' THEN [Value] END) AS ['+CONVERT(nvarchar(10),@date,103)+']'
FETCH NEXT FROM date_cursor INTO @date
END
CLOSE date_cursor
DEALLOCATE date_cursor
EXEC('SELECT ID'+@sql+' FROM table_one GROUP BY ID')
或
声明@loop int、@date date、@sql nvarchar(4000)
声明@attreable表
(
[日期]日期
)
从表1中插入@TENTABLE SELECT DISTINCT[Date],按[Date]订购
设置@sql=''
设置@loop=1
当(@loop@JetJack好的,我已经编辑了我的帖子。谢谢你的回答,当我执行这一行“EXEC('SELECT ID'+@sql++'FROM table_one GROUP BY ID')”时,错误如下:"关键字“FROM”附近的语法不正确,除了此错误之外,一切都正常,请…@JetJack这可能是因为内部版本@sql
中有错误。尝试通过从表中选择“SELECT ID”+@sql+“one GROUP by ID”
获取查询。然后,复制并运行您得到的查询,希望您能解决问题。我运行此qu时类似这样的“选择('Select ID'+@sql++'从表中按ID分组”),显示输出为“选择ID,MAX(CASE CONVERT(nvarchar(10),[Date],103)当'01/01/2012'时,然后[Value]END)为[01/01/2012],MAX从表中按ID分组”@JetJack选择ID,MAX(CASE CONVERT(nvarchar(10),[Date],103),当'01/01/2012'时,然后[Value]END)为[01/01/2012],表\u one GROUP BY ID
中的MAX来自@sql,这是错误的查询。这可能是因为长度可变。@sql没有提供您想要的完整查询。
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 [Value] 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')