Oracle: how to UPSERT (update or insert into a table?)

Question

The UPSERT operation either updates or inserts a row in a table, depending if the table already has a row that matches the data:

if table t has a row exists          


        

Answer 1

Try this,

insert into b_building_property (
  select
    'AREA_IN_COMMON_USE_DOUBLE','Area in Common Use','DOUBLE', null, 9000, 9
  from dual
)
minus
(
  select * from b_building_property where id = 9
)
;