I have a layer of planning units covering a large area (there are over 16000 PU's). Three of the columns in the attribute table hold information about which planning units were included in the solutions from a conservation planning programme (Marxan). So the columns have an ID and then values ranging from 0 to 100 (the number of solutions that PU was included in).
What I am trying to do is to select the PU's from each column that were in all 100 solutions (so have a value of 100) - BUT only the PU's that match i.e. only PU's that have a value of 100 in ALL three columns (the columns represent different run scenarios).
I have tried SQL searches such as "ssoln_1 = 100 WHERE ssoln_2 = 100 AND ssoln_3 = 100" but my SQL is very basic and I am having no luck. Any suggestions would be hugely appreciated - I hope it all makes sense.