Question

嗯，这个标题可能很令人困惑，所以让我试着通过展示一些表格和查询来解释我的问题。我有一个'_commision'表，其中包含以下行：

INSERT INTO table_name (date_column) VALUE ('YYYY-MM-DD');

我需要获取绝对min_commission值和绝对max_commission值。棘手的部分是百分比列，稍后您将看到。我的第一个想法就是这样：

+-------+-------------+------+----------------+----------------+-----------+
| id    | relation_id | type | min_commission | max_commission | percental |
+-------+-------------+------+----------------+----------------+-----------+
| 22892 |        3427 | SALE |           1.40 |           1.80 | yes       |
| 22891 |        3427 | SALE |          30.00 |          60.00 | no        |
| 21075 |        6365 | LEAD |          30.00 |           NULL | no        |
| 19638 |        4436 | SALE |           1.10 |           NULL | yes       |
| 19637 |        4436 | LEAD |          30.00 |           NULL | no        |
+-------+-------------+------+----------------+----------------+-----------+
5 rows in set (0.00 sec)

此查询会产生以下行：

SELECT rc.type, rc.currency_id, rc.percental, 
    MIN( rc.min_commission ) AS min_commission, 
    IF( MAX(GREATEST( rc.min_commission, rc.max_commission )) > MIN( rc.min_commission ) , MAX(GREATEST( rc.min_commission, rc.max_commission )) , 0.00 ) AS max_commission
FROM _commission rc
LEFT JOIN ...
GROUP BY rc.type;

但是，我需要得到一个结果，考虑列'百分比'，因为如果类型为'SALE'，佣金可以是1.4％和30美元（例如百分比或修复）。正如您所看到的，我需要一个像下面这样的结果，但我无法得到合适的查询。这就是结果的样子：

+------+-------------+-----------+----------------+----------------+
| type | currency_id | percental | min_commission | max_commission |
+------+-------------+-----------+----------------+----------------+
| LEAD |           1 | no        |          30.00 |           0.00 |
| SALE |           1 | no        |           1.10 |          60.00 |
+------+-------------+-----------+----------------+----------------+
2 rows in set (0.00 sec)

有什么想法吗？

Answer 1

试试这个，

    SELECT 
            rc.type, rc.currency_id, rc.percental, 
            MIN( rc.min_commission ) AS min_commission, 
            IF( MAX(GREATEST( rc.min_commission, rc.max_commission )) 
            > 
            MIN( rc.min_commission ) , MAX(GREATEST( rc.min_commission, rc.max_commission )) , 0.00 ) AS max_commission
    FROM 
            _commission rc
    LEFT JOIN ...
    GROUP BY 
            rc.type, rc.percental;

MySQL：根据两个不同的ENUM值从不同的行中选择最小值和最大值

1 个答案: