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Posted by Ewoud Dronkert on 10/22/05 13:58
typingcat@gmail.com wrote:
> Say I have a table in a MySQL server
> ID USERNAME COUNT
> 0 JOHN 2
> 1 JANE 3
> 2 HOMER 3
> 3 MOE 2
Generally, it's a bad idea to give a column a name that is also a sql
preserved word (count).
> If I want to increase Homer's count by 1,
> The plain way would be;
> 1)$TEMP=SELECT COUNT WHERE ID=2
> 2)$TEMP++
> 2)UPDATE .. SET COUNT=$temp...
No, you would let the database do the work:
UPDATE Tablename SET count=count+1 WHERE id=2
May need `` around count, because of problem mentioned above. See
http://php.net/mysql-query and
http://dev.mysql.com/doc/refman/4.1/en/update.html
> I guess if there is any special way to increase the int value by one?
> For increasing 1 is so commonly used (that's why c,c++,java,C# has the
> operator ++).
Yes, that operator also exists in PHP:
http://php.net/manual/en/language.operators.increment.php
--
E. Dronkert
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