Conditional WHERE clause with CASE statement in Oracle

Question

I\'m brand-new to the Oracle world so this could be a softball. In working with an SSRS report, I\'m passing in a string of states to a view. The twist is that the users c

Answer 1

You can write the where clause as:

where (case when (:stateCode = '') then (1)
            when (:stateCode != '') and (vw.state_cd in (:stateCode)) then 1
            else 0)
       end) = 1;

Alternatively, remove the case entirely:

where (:stateCode = '') or
      ((:stateCode != '') and vw.state_cd in (:stateCode));

Or, even better:

where (:stateCode = '') or vw.state_cd in (:stateCode)