分割データの合計数ヶ月

Question

で私がレポートに働いていると、この要約のSQL文を作成することで始まっ：

SELECT o.description, 
     sum(t.total_minutes) total_minutes, 
     sum(n.total_new_minutes) total_new_minutes 
FROM job i 
      INNER JOIN 
     operation o ON i.operation_id = o.operation_id 
      CROSS APPLY 
     (
      SELECT SUM(minutes) total_minutes 
      FROM job_time t 
      WHERE i.job_id = t.job_id 
      AND  record_date between '1 JAN 2016' and '29 FEB 2016' 
     ) t 
      CROSS APPLY 
     (
      SELECT SUM(minutes) total_new_minutes 
      FROM job_time t 
      WHERE i.job_id = t.job_id 
      AND  record_date between '1 JAN 2016' and '29 FEB 2016' 
      AND  NOT EXISTS (SELECT 1 FROM job_time v WHERE v.record_date < DATEADD(month, DATEDIFF(month, 0, t.record_date), 0) AND v.job_id = t.job_id) 
     ) n 
GROUP BY o.description 

表構造：私の要約クエリの

Table: job 
job_id  | operation_id 
-------------|------------- 
1   | 1 
2   | 1 
3   | 2 
4   | 2 

Table: operation 
operation_id | description 
-------------|------------- 
1   | 'OP1' 
2   | 'OP2' 

Table: job_time 
job_id  | record_date | minutes 
-------------|--------------|--------- 
1   | '1 JAN 2016' | 20 
1   | '2 JAN 2016' | 20 
2   | '1 JAN 2016' | 20 
2   | '1 FEB 2016' | 20 
3   | '1 FEB 2016' | 20 
3   | '2 FEB 2016' | 20 
4   | '2 JAN 2016' | 20 
4   | '2 FEB 2016' | 20 

結果：

description | total_minutes | total_new_minutes 
-------------|---------------|----------------- 
'OP1'  | 80   | 60 
'OP2'  | 80   | 60 

SQL fiddle：http://sqlfiddle.com/#!6/f28f7e/1/0

アイデアは、指定されたデータ範囲内のジョブに費やされた合計時間を持ちながら、毎月新しい仕事に費やされた合計時間を得ることです。

例2のジョブ2：1月の20分は新しい仕事と見なされますが、2月の20分は古い仕事に費やされます。

私の問題は、私は、以下のように与えられた範囲に毎月この結果を分割したいということです。

description | month  |total_minutes | total_new_minutes 
-------------|-----------|--------------|----------------- 
'OP1'  | '01/2016' | 60   | 60 
'OP1'  | '02/2016' | 20   | 0 
'OP2'  | '01/2016' | 20   | 20 
'OP2'  | '02/2016' | 60   | 40 

クエリの変更は、この結果を反映させるために：

SELECT o.description, 
     sum(t.total_minutes) total_minutes, 
     sum(n.total_new_minutes) total_new_minutes, 
     t.record_month  
FROM job i 
      INNER JOIN 
     operation o ON i.operation_id = o.operation_id 
      CROSS APPLY 
     (
      SELECT SUM(minutes) total_minutes, right(convert(varchar(10),t.record_date,103),7) record_month 
      FROM job_time t 
      WHERE i.job_id = t.job_id 
      AND  record_date between '1 JAN 2016' and '29 FEB 2016' 
      GROUP BY right(convert(varchar(10),t.record_date,103),7) 
     ) t 
      CROSS APPLY 
     (
      SELECT SUM(minutes) total_new_minutes, right(convert(varchar(10),t.record_date,103),7) record_month 
      FROM job_time t 
      WHERE i.job_id = t.job_id 
      AND  record_date between '1 JAN 2016' and '29 FEB 2016' 
      AND  NOT EXISTS (SELECT 1 FROM job_time v WHERE v.record_date < DATEADD(month, DATEDIFF(month, 0, t.record_date), 0) AND v.job_id = t.job_id) 
      GROUP BY right(convert(varchar(10),t.record_date,103),7) 
     ) n  
GROUP BY o.description, t.record_month 

SQLフィドル：http://sqlfiddle.com/#!6/f28f7e/3/0

問題は、tとnとの間でどのように結合が行われているのか理解できません。実際のデータを持つ私の開発者dbでは、 total_minutesよりtotal_new_minutesの分が発生することはありませんが、データの悪さは関係ありません。

私がここで間違っていることや、クエリを完全に変更する必要があると思っているのですか？

Answer 1

ここではCROSS APPLYを使用する理由がわかりません。私の戦略は、別々のサブクエリでtotal_minutesとtotal_new_minutesを計算し、それらを一緒に結合することです。 が最終的なクエリはこれです：それをテストするために必要な

WITH new_job AS (
    SELECT 
     jt1.JOB_ID 
     , EOMONTH(jt1.RECORD_DATE) AS mon 
     , SUM(jt1."MINUTES") AS "MINUTES" 
    FROM 
     #JOB_TIME jt1 
    WHERE 
     NOT EXISTS (
      SELECT 1 
      FROM 
       #JOB_TIME jt2 
      WHERE 
       jt2.JOB_ID = jt1.JOB_ID 
       AND EOMONTH(jt1.RECORD_DATE, -1) = EOMONTH(jt2.RECORD_DATE) 
     ) 
    GROUP BY 
     jt1.JOB_ID 
     , EOMONTH(jt1.RECORD_DATE) 
), new_total AS (
    SELECT 
     j.OPERATION_ID 
     , nj.mon 
     , SUM(nj."MINUTES") AS total_new_minutes 
    FROM 
     new_job nj 
     JOIN #JOB j ON j.JOB_ID = nj.JOB_ID 
    GROUP BY 
     j.OPERATION_ID 
     , nj.mon 
), total AS (
    SELECT 
     j.OPERATION_ID 
     , EOMONTH(jt.RECORD_DATE) AS mon 
     , SUM(jt."MINUTES") AS total_minutes 
    FROM 
     #JOB_TIME jt 
     JOIN #JOB j ON jt.JOB_ID = j.JOB_ID 
    GROUP BY 
     j.OPERATION_ID 
     , EOMONTH(jt.RECORD_DATE) 
) 
SELECT 
    o."DESCRIPTION" 
    , COALESCE(t.mon, nt.mon) 
    , COALESCE(t.total_minutes,0) AS total_minutes 
    , COALESCE(nt.total_new_minutes,0) AS total_new_minutes 
FROM 
    #OPERATION o 
    LEFT JOIN total t ON o.OPERATION_ID = t.OPERATION_ID 
    LEFT JOIN new_total nt ON o.OPERATION_ID = nt.OPERATION_ID AND nt.mon=t.mon; 

すべてのクエリは、このようになります：

CREATE TABLE #JOB (
    JOB_ID INT 
    , OPERATION_ID INT 
); 

CREATE TABLE #OPERATION (
    OPERATION_ID INT 
    , "DESCRIPTION" NCHAR(5) 
); 

CREATE TABLE #JOB_TIME (
    JOB_ID INT 
    , RECORD_DATE DATE 
    , "MINUTES" INT 
) 

INSERT INTO #JOB (JOB_ID, OPERATION_ID) 
VALUES 
(1,1) 
,(2,1) 
,(3,2) 
,(4,2); 

INSERT INTO #OPERATION (OPERATION_ID, "DESCRIPTION") 
VALUES 
(1, 'OP1') 
, (2, 'OP2'); 

INSERT INTO #JOB_TIME (JOB_ID, RECORD_DATE, "MINUTES") 
VALUES 
(1, '20160101', 20) 
, (1, '20160102', 20) 
, (2, '20160101', 20) 
, (2, '20160201', 20) 
, (3, '20160201', 20) 
, (3, '20160202', 20) 
, (4, '20160102', 20) 
, (4, '20160202', 20); 

WITH new_job AS (
    SELECT 
     jt1.JOB_ID 
     , EOMONTH(jt1.RECORD_DATE) AS mon 
     , SUM(jt1."MINUTES") AS "MINUTES" 
    FROM 
     #JOB_TIME jt1 
    WHERE 
     NOT EXISTS (
      SELECT 1 
      FROM 
       #JOB_TIME jt2 
      WHERE 
       jt2.JOB_ID = jt1.JOB_ID 
       AND EOMONTH(jt1.RECORD_DATE, -1) = EOMONTH(jt2.RECORD_DATE) 
     ) 
    GROUP BY 
     jt1.JOB_ID 
     , EOMONTH(jt1.RECORD_DATE) 
), new_total AS (
    SELECT 
     j.OPERATION_ID 
     , nj.mon 
     , SUM(nj."MINUTES") AS total_new_minutes 
    FROM 
     new_job nj 
     JOIN #JOB j ON j.JOB_ID = nj.JOB_ID 
    GROUP BY 
     j.OPERATION_ID 
     , nj.mon 
), total AS (
    SELECT 
     j.OPERATION_ID 
     , EOMONTH(jt.RECORD_DATE) AS mon 
     , SUM(jt."MINUTES") AS total_minutes 
    FROM 
     #JOB_TIME jt 
     JOIN #JOB j ON jt.JOB_ID = j.JOB_ID 
    GROUP BY 
     j.OPERATION_ID 
     , EOMONTH(jt.RECORD_DATE) 
) 
SELECT 
    o."DESCRIPTION" 
    , COALESCE(t.mon, nt.mon) 
    , COALESCE(t.total_minutes,0) AS total_minutes 
    , COALESCE(nt.total_new_minutes,0) AS total_new_minutes 
FROM 
    #OPERATION o 
    LEFT JOIN total t ON o.OPERATION_ID = t.OPERATION_ID 
    LEFT JOIN new_total nt ON o.OPERATION_ID = nt.OPERATION_ID AND nt.mon=t.mon; 


DROP TABLE #JOB; 
DROP TABLE #JOB_TIME; 
DROP TABLE #OPERATION;