CF6 - basic question on Dropdown

Hello, I know I'm doing a stupid question but I'm really not able to find the answer in the forum.
I'm realizing a form that read/save data from a db, I have a field in which I can write 1 2 3 or 4, I want to use a dropdown menu, writing {var:read_data.tblname.field} in the option field I can read the value from the table but: how can I add the other 3 options on the dropdown menu? I did it several times in CF5 but really can't do that in v6.

It needs to end up in the form key => value. So set your database read to "retrieve an array of key / value pairs", and use {var:read_dataname} in the options list.
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There's a demo form explaining this.

Thanks healyhatman, it's probably my poor English but it looks strange to me to do that kind of operation in the database since I have only a rigid choice of 4 options, at the end I simply wrote in the option field:
{var:read_data.tblname.field}
1=1
2=2
3=3
4=4
and it works (I did it at the beginning and it seems not to save the value in db, for sure I did something wrong in configuration).
Thanks for helping me.