How do you select an "empty" date field? I've tried the few ways I can think.
SQL> select prclid from parcel
2 where expdate = '';
no rows selected
SQL> select prclid from parcel
2 where expdate = null;
no rows selected
There are are "empty" date fields in the table as seen here.
SQL> select expdate from parcel
2 where prclid ='20131570070000';
EXPDATE
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