在MysQL或PHP中将记录从一列拆分为两列

Question

I have a problem to split data from attendance machine. The data source after export from it like this:

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

Where record (in and out) from fingerprint time save in one column. And I want to split the data to be like this:

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

How to split those record into 2 column in MySQL or PHP (maybe)? Thank you.

Answer 1

Assuming there is only one in/out per day, it's as simple as self-joining on the date and greater time.

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

If you want to create a brand new table with this data, so you can get rid of the import, you just need to use this query as the input to create table, like so:

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