Пример дополняемости
| create table customer( |  | |
| ЖЖЖ | cname caddress start_year | varchar(30), varchar(40), int); |
| create table order( | ||
| orderID cname amount date | int, varchar(30), money, date); |
| create table facility( | | |
| ЖЖЖ |
fname faddress |
varchar(30), varchar(40)); |
| create table component( | ||
|
component_id description fname |
varchar(20), varchar(100), varchar(30)); |