Mysql 合并两个不同的查询

大家好，我有两个不同的问题：

SELECT ROUND(x, -1)    AS range,
COUNT(*)    
FROM  tbl_name
GROUP  BY range;

及

两个查询都返回两列，如下所示： 0 | 22

我想结合这两个查询，返回3个冒号，如下所示

---

0 | 22 | 20

如果只有一行，那么解决方案很简单。只需使用

连接

。比如：

select q1.range, q1.cnt, q2.cnt
from (<query1>) q1 join (<query2>) q2 on q1.range = q2.range;

select q1.range, q1.cnt, q2.cnt
from (<query1>) q1 join (<query2>) q2 on q1.range = q2.range;

select range, sum(xcnt), sum(ycnt)
from ((SELECT ROUND(x, -1) AS range, COUNT(*) as xcnt, 0 as ycnt
       FROM  tbl_name
       GROUP BY range
      ) union all
      (SELECT ROUND(y, -1) AS range, 0, COUNT(*)    
       FROM   tbl_name
       GROUP  BY range
      )
     ) t
group by range;