Question

我正在尝试使用这些查询进行计数。我希望它显示我所有的名字主持人（虽然计数是0）但是使用这些查询，计数为0的nameHost不显示nameHost。你能帮帮我吗？

 select a.nameHost, count(b.job_name) as cuenta
                from jobsDefinition b
                         right join cmdmzpre.nodes a
                        on b.node_id in (a.nodeid,a.nameHost) 
                         where b.app not like 'UNPLAN' group by a.nameHost order by a.nameHost desc;

表格示例：

nodes         
=======
nameHost        nodeid
---------       -------
a               a
b               b
b               f
e               g



jobsDefinition
================
node_id        job_name
----------     -----------
a               fruit
b               apple
c               iron
a               banana
f               orange

输出结果为：

a 2 (fruit,banana)
b 2 (apple,orange)
e 0

Answer 1

正如我的评论中提到的，From your dataset, **a** should be **2**.

使用此查询：

  ---Table Data start ----

WITH nodes (nameHost, nodeid)
     AS (SELECT 'a', 'a' FROM DUAL
         UNION ALL
         SELECT 'b', 'b' FROM DUAL
         UNION ALL
         SELECT 'b', 'f' FROM DUAL
         UNION ALL
         SELECT 'e', 'g' FROM DUAL),
     jobdef (node_id, job_name)
     AS (SELECT 'a', 'fruit' FROM DUAL
         UNION ALL
         SELECT 'b', 'apple' FROM DUAL
         UNION ALL
         SELECT 'c', 'iron' FROM DUAL
         UNION ALL
         SELECT 'a', 'banana' FROM DUAL
         UNION ALL
         SELECT 'f', 'orange' FROM DUAL)
  --Table data end---
  --Actual Query
  SELECT n.namehost,
         COUNT (jd.node_id) AS Cnt,
         LISTAGG (jd.job_name, ',') WITHIN GROUP (ORDER BY 1) JB_NM
    FROM nodes n 
    LEFT JOIN jobdef jd 
    ON n.nodeid = jd.node_id
GROUP BY n.namehost
ORDER BY namehost;

有些寄存器无法用sql获取

1 个答案: