sql - selecting with nvl function -


i have query :

 select w.worker_id,   w.lastname,pd.invalid                              workers w,personal_data pd                              pd.worker_id (+) = w.worker_id                              , nvl(pd.invalid,'n')='y'

i have check box (y,n), purpose of check box list invalids if checked , when not checked normal workers including invalids. invalid list.

and select :

  select w.worker_id,   w.lastname,pd.invalid                                  workers w,personal_data pd                                  pd.worker_id (+) = w.worker_id                                  , pd.invalid =nvl(:p_invalid,pd_invalid)

if checkbox y invalid workers , when not checked (n) normal workers, need when n workers ( invalid , normal ).

stop using (+) syntax! use proper, explicit outer joins.

however, don't think need outer join -- comparison constant undoes anyway. think want:

select w.worker_id, w.lastname, pd.invalid workers w join      personal_data pd     on pd.worker_id = w.worker_id (:p_invalid = 'n' or pd.invalid = :p_invalid);

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