PRIMARY KEY = UNIQUE & NOT NULL so there's no reason to re-type NOT NULL w/ PRIMARY KEY constraint. It will automatically be UNIQUE NOT NULL.
carlosinfl 1 month ago
thanx a lot, this tutorial is very very useful. Is there any tutorial that has to do with the spatial extention, postgis? This would be very useful too.
Arapo23 2 years ago
PRIMARY KEY = UNIQUE & NOT NULL so there's no reason to re-type NOT NULL w/ PRIMARY KEY constraint. It will automatically be UNIQUE NOT NULL.
carlosinfl 1 month ago
thanx a lot, this tutorial is very very useful. Is there any tutorial that has to do with the spatial extention, postgis? This would be very useful too.
Arapo23 2 years ago