update mydata set column1 = column2, column2 = column1
(works in sqlserver, can't try mysql at the moment)
You can select which rows by adding a where clause obviously.
I suppose that the field values are copied to a buffer which is the written
to the table at the end of the update (or row by row?)
----- Original Message -----
From: "nixofortune" <nixofort...@googlemail.com>
To: <mysql@lists.mysql.com>
Sent: Wednesday, September 22, 2010 5:29 PM
Subject: Swap data in columns
Hi all.
Sorry for very simple question, just can't figure out the solution.
I need to swap data in column1 with data in column2.
+----+---------+---------+
| id | column1 | column2 |
+----+---------+---------+
| 1 | a | z |
| 2 | b | y |
| 3 | c | x |
| 4 | d | w |
| 5 | e | v |
+----+---------+---------+
Can you achieve this with a simple query?
so for id 1 column1 = 'z' and column2 = 'a' and so on.
Thanks guys,
Igor
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