Question

我有这个工作查询以我喜欢的方式生成数据但现在我希望它添加另一个子句语句，它将从tbl_loan_master获取不在tbl_loanledger上的行。 / p>

示例数据：

tbl_borrowers

------------------------------------------
| id | first_name | last_name | deleted  |
|  1 |     Joe    |   Smith   |    0     |
|  2 |    Lily    |    Mag    |    0     |
|  3 |     Zen    |   Green   |    0     |
|  4 |    Kim     |   Chan    |    0     |
|  5 |    Bob     |   Mac     |    1     |
|  6 |    Ben     |  Cork     |    0     |
------------------------------------------

tbl_loan_master

----------------------------------------------------------------------
| id | borrowers_id |  loan  | date_created |  due_date  |  deleted  |
|  1 |       4      |  300   |   2016/04/28 | 2017/04/28 |     0     |
|  2 |       1      |  100   |   2016/05/05 | 2017/05/05 |     0     |
|  3 |       2      |  500   |   2016/06/08 | 2017/06/08 |     0     |
|  4 |       1      |  200   |   2016/06/13 | 2017/06/13 |     0     |
|  5 |       3      |  150   |   2016/06/15 | 2017/06/15 |     0     |
|  6 |       6      |   50   |   2016/06/16 | 2017/06/16 |     0     |
----------------------------------------------------------------------

tbl_loanledger

------------------------------------------------------------------------------
| id | borrowers_id | loanmaster_id | payment | balance| date_created | deleted
|  1 |       4      |      1        |    50   |   250  |  2016/05/28  |   0
|  2 |       1      |      2        |    20   |    80  |  2016/05/25  |   0
|  3 |       1      |      2        |    30   |    50  |  2016/06/01  |   0
|  4 |       2      |      3        |   100   |   400  |  2016/06/09  |   0
|  5 |       2      |      3        |    50   |   350  |  2016/06/10  |   0
|  6 |       3      |      4        |    50   |   150  |  2016/06/16  |   0
------------------------------------------------------------------------------

以下是工作查询：

$query = "SELECT `tbl_borrowers`.* , `tbl_loanledger`.*, `tbl_loan_master`.*
    FROM `tbl_borrowers` 
    LEFT JOIN `tbl_loanledger` 
        ON `tbl_borrowers`.id = `tbl_loanledger`.borrower_id
    LEFT JOIN `tbl_loan_master`
         ON `tbl_loan_master`.id = `tbl_loanledger`.loanmaster_id
    WHERE `tbl_borrowers`.deleted = 0 AND `tbl_loanledger`.deleted = 0 AND MONTH ( `tbl_loanledger`.date_created) = MONTH(CURRENT_DATE)
        GROUP BY `tbl_loanledger`.borrower_id 
        ORDER BY `tbl_borrowers`.last_name";

预期结果将在借款分类账和贷款账户中输出借款人当前月份（即6月份）的最后一笔交易。就像Ben Cork不在贷款分类账上一样，他在贷款账户上，但我想在结果集上输出他。删除列表示如果为0，则表示它处于活动状态（如果为0）表示已删除。

预期结果：

|First Name | Last Name |   Due Date   |    Balance     |
|    Ben    |    Cork   |  2017/06/16  |      50        |
|    Joe    |    Smith  |  2017/06/13  |      50        |
|    Lily   |     Mag   |  2017/06/08  |      350       |
|    Zen    |    Green  |  2017/06/15  |      150       |

Answer 1

尝试以下内容;）

select 
    tb.first_name, tb.last_name, coalesce(tlm.Loan, 0) as Loan, coalesce(t.`Amount Paid`, 0) as `Last Amount Paid`
from tbl_borrowers tb
left join tbl_loan_master tlm
on tb.id = tlm.borrowers_id
left join (
    select t1.*
    from tbl_loanledger t1
    inner join (
        select max(id) as id
        from tbl_loanledger
        group by borrowers_id, loanmaster_id
    ) t2 on t1.id = t2.id
) t
on tb.id = t.borrowers_id
and tlm.id = t.loanmaster_id

SQLFiddle DEMO HERE

获取在另一个表上不匹配的行

1 个答案: