计算转换列和连接列的不同性，并按每条记录分组

Question

select
 distinct convert(varchar(8), Creative.Width) + 'x' + convert(varchar(8), Creative.Height) as FormatName 
 from Creative 
 where CreativeFileDate > '1 SEP 18'

查询根据我的连接提取唯一记录。我现在如何最有效地查找每个计数？

谢谢

Answer 1

您将要使用分组依据和计数

https://www.w3schools.com/sql/sql_groupby.asp https://www.w3schools.com/sql/sql_count_avg_sum.asp

我的SQL有点生锈，但是您的查询应该类似于：

select convert(varchar(8), Creative.Width) + 'x' + convert(varchar(8), Creative.Height) as FormatName, count(0)
 from Creative 
 where CreativeFileDate > '1 SEP 18'
group by convert(varchar(8), Creative.Width) + 'x' + convert(varchar(8), Creative.Height)

欢呼