We have a number of constraints on our table and we really should understand what they do at a deeper level. In this video we'll dive into the constraint code below.

create table inms(  id bigserial primary key,  created_at timestamp not null,  altitude numeric(9,2) not null check(altitude > 0),  source text not null check(source in('osi','csn','osnb','osnt'))  mass numeric(6,3) not null check(mass >=0.125 and mass < 100),  high_sensitivity_count int not null check(high_sensitivity_count > 0),  low_sensitivity_count int not null check(low_sensitivity_count > 0));