Good day...
I'm trying to build a query for PGSQL 9.1 where a table has two
references with only one being used depending of the type of entry..
For example, the table has following simplified structure:
portid primary keyport2node index to table nodeport2card index to table card
So how can I do a conditional FROM clause in the query depending on the
column port2node and port2card?
If port2card is Null or 0 I don't want it in the FROM clause as the
query will return unneccessary duplicate
row...the same goes for port2node being Null or 0...
thanx in advance
richard
