我正在嘗試構建複雜的
mysql查詢,但它返回錯誤的結果……
select
b.name as batch_name,
b.id as batch_id,
count(distinct s.id)
as total_students,
coalesce( sum(s.open_bal), 0 )
as open_balance,
sum( coalesce(i.reg_fee, 0)
+ coalesce(i.tut_fee, 0)
+ coalesce(i.other_fee, 0)
) as gross_fee,
sum( coalesce(i.discount, 0) )
as discount,
coalesce( sum(s.open_bal), 0 )
+ sum( coalesce(i.reg_fee, 0)
+ coalesce(i.tut_fee, 0)
+ coalesce(i.other_fee, 0)
- sum( coalesce(i.discount, 0) )
as net_payable,
sum( coalesce(r.reg_fee, 0)
+ coalesce(r.tut_fee, 0)
+ coalesce(r.other_fee, 0)
) as net_recieved,
( coalesce( sum(s.open_bal), 0 )
+ sum( coalesce(i.reg_fee, 0)
+ coalesce(i.tut_fee, 0)
+ coalesce(i.other_fee, 0)
- sum( coalesce(i.discount, 0) )
- ( sum( coalesce(r.reg_fee, 0)
+ coalesce(r.tut_fee, 0)
+ coalesce(r.other_fee, 0)
as balance_due
from batches b
left join students s on s.batch = b.id
left join invoices i on i.student_id = s.id
left join recipts r on r.student_id = s.id
where s.inactive = 0
group by b.name, b.id;
返回以下結果……
| batch_name | total_students | open_bal | gross_fee | discount | net_payable | net_recieved | due_balance |
| ms | 6 | 10000 | 0 | 0 | 10000 | 101000 | -91000 |
批次表| id | name |
| 9 | ms |
學生表| id | open_bal | batch | inactive |
| 44 | -16000 | 9 | 0 |
| 182 | 9000 | 9 | 0 |
| 184 | -36000 | 9 | 0 |
| 185 | 19000 | 9 | 0 |
| 186 | 9000 | 9 | 0 |
| 187 | 4000 | 9 | 0 |
發票表| id | student_id | reg_fee | tut_fee | other_fee | net_payable | discount |
上述學生id沒有發票.
收件表| id | student_id | reg_fee | tut_fee | other_fee | status |
| 8 | 44 | 0 | 0 | 1500 | confirmed |
| 277 | 44 | 0 | 50000 | 0 | confirmed |
| 26 | 182 | 0 | 0 | 1500 | confirmed |
| 424 | 182 | 0 | 15000 | 0 | confirmed |
| 468 | 182 | 0 | 15000 | 0 | confirmed |
| 36 | 185 | 0 | 0 | 1500 | confirmed |
| 697 | 185 | 0 | 15000 | 0 | confirmed |
| 66 | 187 | 0 | 0 | 1500 | confirmed |
使用上面的sql查詢和**的預期結果……
| batch_name | total_students | open_bal | gross_fee | discount | net_payable | net_recieved | due_balance |
| ms | 6 | -11000 | 0 | 0 | 10000 | 101000 | -112000 |
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