Rookie question... But without brackets the below is confusing me.
WHERE DisDate >= xxxxxxxx
OR EndDate >= xxxxxxxx
AND DisDate IS NULL
Should this perform like A or B?
A:
WHERE (DisDate >= xxxxxxxx
OR EndDate >= xxxxxxxx)
AND DisDate IS NULL
B:
WHERE DisDate >= xxxxxxxx
OR (EndDate >= xxxxxxxx
AND DisDate IS NULL)