Question

I would like to select a start column and an end column from a single MySQL datetime column from a table called tbl. Any suggestions?

What I start with:

+---------------------+
|      date_time      |
+---------------------+
| 2012-03-05 10:15:52 |
| 2012-03-05 10:15:53 |
| 2012-03-05 10:15:54 |
+---------------------+  

Wanted result:

+---------------------+---------------------+
|     start_time      |      end_time       |
+---------------------+---------------------+
| 2012-03-05 10:15:52 | 2012-03-05 10:15:53 |
| 2012-03-05 10:15:53 | 2012-03-05 10:15:54 |
+---------------------+---------------------+

Answer 1

SELECT   cur.date_time AS start_time, MIN(nxt.date_time) AS end_time
FROM     my_table AS cur JOIN my_table AS nxt ON nxt.date_time > cur.date_time
GROUP BY cur.date_time

See it on sqlfiddle.