如何结合2个查询？

Question

我无法结合这两个查询，我的问题是我想如何加入这两个查询？我是否使用加入？我想结合这两个查询，因为我正在处理某些要求。我的用例是用于显示sdrp15返回表中是否有日期。关于我的表，连接这两个查询的唯一东西是state_code列和阶段，这两列是我所有表中显示的唯一列。

查询1

select a.phase,a.st_code||' - '||b.state_name AS CHG, 
    case when a.submission_received_dt is not null then 'Y' else 'N' end as Changes 
    from pcspro.sdrp15_return a, 
    pcspro.sdrp15_states_ready b 
    where a.phase = b.phase and a.st_code = b.state; 

结果1：

PHASE STATE CHG 

---

A 01 - AL Y   
    A 11 - DC Y  
    A 16 - ID Y  

查询2个

select count(cou_code) as changes, state_code 
    from sdrp15_submission_log sl 
    where state_code in (select distinct state_code from sdrp15_submission_log 
          where state_code = sl.state_code 
          and cou_code != 'All') 
    and qa_date is null 
    and phase = 'A'      
    group by state_code; 

结果2：

CHANGES STATE_CODE 

    -------- ------- 
     29 01   
     2 11   
     2 16   

和我想要做的就是将它们结合起来和我预期的结果应该是：

PHASE STATE CHG CHANGES 

------ ------- ------ -------- 
    A 01 - AL Y  29 
    A 11 - DC Y  02 
    A 16 - ID Y  02 
    A 08 - HA Y  NULL 

Answer 1

个人而言，我需要更多的信息。然而，也许下面就为你工作（我没有测试它！）：根据评论

SELECT 
    a.phase AS PHASE, 
    a.st_code||' - '||b.state_name AS [STATE], 
    CASE WHEN a.submission_received_dt IS NOT NULL THEN 'Y' ELSE 'N' END AS CHG, 
    x.changes AS CHANGES 
FROM pcspro.sdrp15_return a 
INNER JOIN pcspro.sdrp15_states_ready b 
    ON a.phase = b.phase AND a.st_code = b.state 
LEFT JOIN (
    SELECT 
     COUNT(cou_code) AS changes, 
     state_code 
    FROM sdrp15_submission_log sl 
    WHERE state_code IN (
     SELECT DISTINCT state_code 
     FROM sdrp15_submission_log 
     WHERE state_code = sl.state_code AND cou_code != 'All') 
     AND qa_date IS NULL AND phase = 'A'      
    GROUP BY state_code; 
) x ON x.state_code = a.st_code 

编辑：

SELECT 
    a.phase AS PHASE, 
    a.st_code||' - '||b.state_name AS [STATE], 
    CASE WHEN a.submission_received_dt IS NOT NULL THEN 'Y' ELSE 'N' END AS CHG, 
    x.changes AS CHANGES_qa_date_null, 
    y.changes AS CHANGES_qa_date_not_null 
FROM pcspro.sdrp15_return a 
INNER JOIN pcspro.sdrp15_states_ready b 
    ON a.phase = b.phase AND a.st_code = b.state 
LEFT JOIN (
    SELECT 
     COUNT(cou_code) AS changes, 
     state_code 
    FROM sdrp15_submission_log sl 
    WHERE state_code IN (
     SELECT DISTINCT state_code 
     FROM sdrp15_submission_log 
     WHERE state_code = sl.state_code AND cou_code != 'All') 
     AND qa_date IS NULL AND phase = 'A'      
    GROUP BY state_code; 
) x ON x.state_code = a.st_code 
LEFT JOIN (
    SELECT 
     COUNT(cou_code) AS changes, 
     state_code 
    FROM sdrp15_submission_log sl 
    WHERE state_code IN (
     SELECT DISTINCT state_code 
     FROM sdrp15_submission_log 
     WHERE state_code = sl.state_code AND cou_code != 'All') 
     AND qa_date IS NOT NULL AND phase = 'A'      
    GROUP BY state_code; 
) y ON y.state_code = a.st_code