Question

我在从考勤机分割数据时遇到问题。从中导出后的数据源如下：

id name  att
1  John  01/04/2015   7:59:00
1  John  01/04/2015  17:44:00
1  John  02/04/2015   7:50:00
1  John  02/04/2015  18:14

指纹时间的记录（进出）保存在一列中。我想将数据拆分为：

id name  in                  out
1  John  01/04/2015 7:59:00  01/04/2015 17:44:00
1  John  02/04/2015 7:50:00  02/04/2015 18:14:00

如何将这些记录拆分为MySQL或PHP中的2列（可能）？谢谢。

Answer 1

你可以试试这个。

        SELECT a.userID,a.name,min(a.att)as `in`,max(a.att) as `out`
        FROM
            (
                SELECT userID,name,str_to_date(att,'%m/%d/%Y%T') as att,str_to_date(att,'%m/%d/%Y') as attd
                FROM attendance
            ) as a
        GROUP BY a.userID,a.attd

Answer 2

假设每天只有一次进/出，就像在日期和更长时间内自我加入一样简单。

select t1.id, t1.name, t1.att as `in`, t2.att as `out`
  from table1 t1
    inner join table1 t2
      on date(t1.att) = date(t2.att) and t1.id = t2.id
        and t2.att > t1.att

sql fiddle demo

如果你想用这些数据创建一个全新的表，那么你可以摆脱导入，你只需要使用这个查询作为create table的输入，如下所示：

create table new_table
  as
    select t1.id, t1.name, t1.att as `in`, t2.att as `out`
      from table1 t1
        inner join table1 t2
          on date(t1.att) = date(t2.att) and t1.id = t2.id
            and t2.att > t1.att

在MysQL或PHP

2 个答案: