Hi,
this is probably an SQL question instead of PostgreSQL but here it goes.
I have a table containing phone destinations and pricing as follows:
prefix | cost | timeframe | provider
----------------------------------------
^31 | 0.02 | 1 | 1
^31 | 0.01 | 2 | 1
^31653 | 0.14 | 1 | 1
^31653 | 0.12 | 2 | 1
^31 | 0.03 | 1 | 2
^31 | 0.02 | 2 | 2
^31653 | 0.15 | 1 | 2
^31653 | 0.13 | 2 | 2
where timeframe=2 means weekends.
For a given phonenumber I need to get the list of providers with the
cheapest one first. Suppose the target phonenumber is 31653445566,
and timeframe is 2:
prefix | cost | timeframe | provider
----------------------------------------
^31653 | 0.12 | 2 | 1
^31653 | 0.13 | 2 | 2
But I cannot find a query to get this result. I only want
the ^31653 rows, and not the ^31 rows, but these both match
a 'where'31653445566' ~ prefix' clause. Using distinct does not
work as well.
Please help,
Thanks,
Ron