合并计数和合并列 PL/SQL

Question

如何将这两个查询组合在一起以获得 3 列结果？ BR_SURG_SLN_POS 和 BR_SURG_NSLN_POS 始终为 0-4，因此如果这两列可以合并为一列，因为它们的值相同。 我希望接下来的两列是 count(BR_SURG_SLN_POS) 和 count(BR_SURG_NSLN_POS)。我尝试使用 concat 合并两列，但这不是我想要的结果。

select 
br_surg_SLN_POS,
count(BR_SURG_SLN_POS)<BR>
from BR_SURGERY<BR>
where BR_SURG_SLN_POS between 0 and 4<BR>
group by 
BR_SURG_SLN_POS<BR>
order by 
BR_SURG_SLN_POS

---

select 
br_surg_NSLN_POS,
count(BR_SURG_NSLN_POS)<BR>
from BR_SURGERY<BR>
where BR_SURG_NSLN_POS between 0 and 4<BR>
group by 
BR_SURG_NSLN_POS<BR>
order by 
BR_SURG_NSLN_POS

---

与此类似：

Answer 1

试试这个

select t1.sln_value, t1.sln_cnt , t2.nsln_cnt from
     (select 
         br_surg_SLN_POS sln_value,
        count(BR_SURG_SLN_POS) sln_cnt
     from BR_SURGERY
      where BR_SURG_SLN_POS between 0 and 4<BR>
        group by 
           BR_SURG_SLN_POS) t1,
    (select 
           br_surg_NSLN_POS nsln_value,
          count(BR_SURG_NSLN_POS) nsln_cnt
         from BR_SURGERY
        where BR_SURG_NSLN_POS between 0 and 4
           group by 
            BR_SURG_NSLN_POS ) t2
             where t1.sln_value = t2.nsln_value
           ;