计算考勤系统中的出入境时间

Question

我正在尝试格式化考勤系统中的出入时间。我已经能够将数据格式化为以下形式。

+----------+--------------+-----------+------------------+------+
| Emp_Name | IO_Date_Only | IO_Status |     IO_Time      | Flag |
+----------+--------------+-----------+------------------+------+
| AA       | 08-01-2018   | Enter     | 08-01-2018 11:44 | N    |
| AA       | 08-01-2018   | Exit      | 08-01-2018 11:51 | N    |
| AA       | 08-01-2018   | Exit      | 08-01-2018 11:52 | Y    |
| AA       | 08-02-2018   | Exit      | 08-02-2018 11:44 | N    |
| AA       | 08-02-2018   | Exit      | 08-02-2018 11:51 | Y    |
| AA       | 08-02-2018   | Exit      | 08-02-2018 11:52 | Y    |
| BB       | 08-01-2018   | Exit      | 08-01-2018 11:44 | N    |
| BB       | 08-01-2018   | Exit      | 08-01-2018 11:51 | Y    |
| BB       | 08-01-2018   | Enter     | 08-01-2018 11:52 | N    |
| BB       | 08-02-2018   | Enter     | 08-02-2018 11:44 | N    |
| BB       | 08-02-2018   | Enter     | 08-02-2018 11:51 | Y    |
| BB       | 08-02-2018   | Exit      | 08-02-2018 11:52 | N    |
| BB       | 08-02-2018   | Enter     | 08-02-2018 11:55 | N    |
| BB       | 08-02-2018   | Exit      | 08-02-2018 11:57 | N    |
+----------+--------------+-----------+------------------+------+

如果我采用第一行和第二行，则可以看到上面的数据，您会看到第一行是入口，第二行是出口。但是，第三行也是出口。当最终尝试提取此数据时，我想忽略第二行，但取第三行。

基本上我想做的是，如果有两个连续的入口，那么我需要拉第一行，如果有连续的出口，那么我需要拉该组的最后一个出口行，我已经将源格式化为上述格式使用Talend进行输出，但现在有点卡住了。

输出应如下所示

+----------+--------------+-----------+------------------+------+
| Emp_Name | IO_Date_Only | IO_Status |     IO_Time      | Flag |
+----------+--------------+-----------+------------------+------+
| AA       | 08-01-2018   | Enter     | 08-01-2018 11:44 | N    |
| AA       | 08-01-2018   | Exit      | 08-01-2018 11:52 | Y    |
| BB       | 08-01-2018   | Enter     | 08-01-2018 11:52 | N    |
| BB       | 08-02-2018   | Enter     | 08-02-2018 11:44 | N    |
| BB       | 08-02-2018   | Exit      | 08-02-2018 11:52 | N    |
| BB       | 08-02-2018   | Enter     | 08-02-2018 11:55 | N    |
| BB       | 08-02-2018   | Exit      | 08-02-2018 11:57 | N    |
+----------+--------------+-----------+------------------+------+

Answer 1

尝试

select emp_name, IO_Status, IO_Date_Only, min(IO_Time) as IN, max(IO_Time) as OUT
from table
group by emp_name, IO_Status, IO_Date_Only;