dougong8012
2015-05-15 04:27
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在MysQL或PHP中将记录从一列拆分为两列

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.

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我从出勤机器中分割数据时遇到问题。 从中输出后的数据源如下:

 
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 一栏。 我想将数据拆分为这样:

 
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( 也许)? 谢谢。

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2条回答 默认 最新

  • dongwuxie7976 2015-05-15 04:36
    已采纳

    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
    
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