동적 작업에 대한 쿼리

Question

이 굵은 부분과 같은 것을하고 싶습니다. 나는 그것이 가능한지 모른다. 여기 좀 도와주세요. 부분 사이 // 시작 // // 가능합니까?

SELECT a.id, b.id, b.number, c.total, 

//Start 

SUM(total WHERE c.id=a.id) AS sum_total 

//End 

FROM table_1 a 
LEFT JOIN table_2 b ON a.id=b.id 
INNER JOIN table_4 ON b.company=c.company 
INNER JOIN table_3 c ON b.number=c.id_number 
WHERE b.date BETWEEN 'date_1' AND 'date_2' 
ORDER BY d.company ASC 

Answer 1

물론 가능합니다. SQL 다음보십시오 :

SELECT a.id, b.id, b.number, SUM(c.total)TOTAL, 

//Start 

SUM(case when c.id=a.id then total else 0 end) AS sum_total 

//End 

FROM table_1 a 
LEFT JOIN table_2 b ON a.id=b.id 
INNER JOIN table_4 ON b.company=c.company 
INNER JOIN table_3 c ON b.number=c.id_number 
WHERE b.date BETWEEN 'date_1' AND 'date_2' 
GROUP BY 1,2,3 
ORDER BY d.company ASC 

Answer 2

당신이 그것을 수행하는 GROUP BY을 사용하는 것, 그것은 같은 :

SELECT a.id, b.id, b.number, c.total, 

//Start 

SUM(total) AS sum_total 

//End 

FROM table_1 a 

LEFT JOIN table_2 b ON a.id=b.id 
INNER JOIN table_4 ON b.company=c.company 
INNER JOIN table_3 c ON b.number=c.id_number 
WHERE b.date BETWEEN 'date_1' AND 'date_2' AND 
     c.id = a.id 
GROUP BY a.id, b.id 

ORDER BY d.company ASC 

http://www.w3resource.com/sql/aggregate-functions/sum-with-group-by.php