sql多表行转列、级联行转列示例代码

网络编程 2021-07-05 13:42www.168986.cn编程入门
这篇文章主要介绍了sql多表行转列、级联行转列示例代码,需要的朋友可以参考下
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
时间 总数 商品1 商品2 商品3
2013-11-11 5 1 0 4
2013-11-10 13 2 11 1

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