Question

我正在尝试编写一个查询，以查找订单7658（表名称 - ECOM_DATA）状态从15到20之间的天数差异

ORD_NO   INT_ORD_LINE_STAT_EXP      STAT_DATE_ACT         STAT_DATE_EXP

 7658          15                 11-OCT-17 00:00:00    11-OCT-17 00:00:00
 7658          20                 16-OCT-17 00:00:00    16-OCT-17 00:00:00

有人可以建议吗？感谢您的帮助。

Answer 1

最小化设置：

create table ecom_data
(
    ord_no                 integer,
    int_ord_line_stat_exp  integer,
    stat_date_act          timestamp
);

insert into ecom_data (ord_no, int_ord_line_stat_exp, stat_date_act) values (7658, 15, '2017-10-11');
insert into ecom_data (ord_no, int_ord_line_stat_exp, stat_date_act) values (7658, 20, '2017-10-16');

查询：

select
    a.ord_no,
    datediff(b.stat_date_act, a.stat_date_act) as days_between
from
    (
        select 
            ord_no,
            stat_date_act
        from
            ecom_data
        where 
            int_ord_line_stat_exp = 15
     ) a
     join
     (
        select 
            ord_no,
            stat_date_act
        from
            ecom_data
        where 
            int_ord_line_stat_exp = 20
     ) b
     on a.ord_no = b.ord_no
where
    a.ord_no = 7658;

结果：

+--------+--------------+
| ord_no | days_between |
+--------+--------------+
|   7658 |            5 |
+--------+--------------+
1 row in set (0.01 sec)

查询以查找状态A到状态B之间的时间

1 个答案: