create table categories(
cat_id int not null primary key,
cat_name varchar(255) not null,
cat_description text
) engine=innodb;
create table products(
prd_id int not null auto_increment primary key,
prd_name varchar(355) not null,
prd_price decimal,
cat_id int not null,
foreign key fk_cat(cat_id)
references categories(cat_id)
on update cascade
) engine=innodb;
insert into categories values (1, 'drinks', 'drinks');
update categories set cat_description=2 where cat_id=1;
drop table products, categories;