结合两个MySQL查询

Question

我有两个SQL查询...

set @count:=0; 
select @count:=@count+1 as SNO, col1, col2 FROM table; 

我想上面的查询组合成一个单一的查询。任何帮助？

Answer 1

你可以简单的做到这一点，

select @count:=@count+1 as SNO, col1, col2 
FROM table, (SELECT @count:=0) r ; 

就像添加ROWNUMBER每一行

select @rownum:=@rownum+1 ‘rank’, 
     p.* 
from player p, (SELECT @rownum:=0) r 
order by score 
desc limit 10; 

Adding RowNumber in MySQL

Answer 2

组合两个查询..

SELECT t1.field1, t1.field2, t2.field1 
FROM (query1) as t1, (query2) as t2 
WHERE t1.field1= t2.field1 

希望这会起作用...

Answer 3

根据我的理解，您正在寻找Row_Number函数在这种情况下。如果这是正确的，请看看here

例如

Select @count := @count + 1 As SNO, col1, col2 
From table ,(SELECT @count:=0) foo 

可以帮助

您也可以参考ROW_NUMBER, Partition, and Over in MySQL更多的理解在同一

Answer 4

select @count:=@count+1 as SNO, col1, col2 FROM table, (SELECT @count:=0) t;