PCB MS SQL 行转列(动态拼SQL)

Posted 2020-11-21 pcbren

 一.原数据：

SELECT inman,indate
FROM [fp_db].[dbo].[ppezhpbb]
WHERE indate > \'2016-5-1\' AND indate < \'2016-6-1\'
ORDER BY indate

 

二.转换后（动态拼接SQL）：

--数据先存临时表
SELECT  inman,indate INTO #tab
FROM [fp_db].[dbo].[ppezhpbb]
WHERE indate > \'2016-5-1\' AND indate < \'2016-6-1\'
--拼接字符串
DECLARE @sql NVARCHAR(MAX)
SET @sql = \'SELECT CONVERT(varchar(100), indate, 23) indate \' 
SELECT @sql = @sql + \' ,sum(case when inman=\'\'\' + inman + \'\'\' then 1 else 0 end) \' + inman  --行转列统计
FROM #tab
GROUP BY inman   --需由列转行的字段
SET @sql = @sql + \' FROM [fp_db].[dbo].[ppezhpbb] WHERE indate > \'\'2016-5-1\'\' AND indate < \'\'2016-6-1\'\' \'
SET @sql = @sql + \' GROUP BY CONVERT(varchar(100), indate, 23) \'
SET @sql = @sql + \' ORDER BY indate \'
SELECT @sql
exec sp_executesql @sql