>
> Like "Tell me how much i spent between the 4th and the 7th og this
month
> ?" uses 4 and 7 as arguments, but need to fetch the datas in the
> database.
> Clear enough ? :-)
Yes.
>
> What do you mean by table function ?
Table functions are aka SetReturningFunctions.
Refer to
http://techdocs.postgresql.org/guides/SetReturningFunctions
Regards, Christoph