sql多表行转列/级联行转列示例代码
2014-05-12来源：易贤网
现有两表A，B
A表存储商品点击日志，B表存储商品
要求显示当天所有商品点击量列表并附带总数并按天排序
代码如下:
declare @sql varchar(2000)
set @sql='select CONVERT(varchar(100), a.[Time], 23) as 时间,count(b.title) as 总数'
select @sql =@sql+ ',sum(case b.title when '''+Title+''' then 1 else 0 end) as '+'['+Title+']'
from (select distinct title from B) as B
set @sql=@sql+' from A as a left join B as b on a.AId=B.Aid
group by CONVERT(varchar(100), a.[Time], 23) order by CONVERT(varchar(100), a.[Time], 23) desc'
exec(@sql)
显示结果
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