How can i combine two columns

hi

how can i combine too cols to one.

col1 | col2
-----+-----
1 | 3
2 | 5

select combine(col1,col2) from table; (or whatever the command will be)
should give something like:

combine
-------
1
3
2
5

ville jungman, ulvilantie 3 b 11, 00350 helsinki, finland
tel. + 358 - 9 - 225 4482 , http://www.kolumbus.fi/vilmak
usko Herraan Jeesukseen, niin sin pelastut. (apt. 16:31)

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