sql多表行转列、级联行转列示例代码

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


复制代码 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