제품, 고객, 판매 연습을 위한 테이블 생성
data 연습 CREATE DATABASE OnlineShopDB; go CREATE TABLE customersTbl ( custIdvarchar(8) primary key, custNamenvarchar(10) not null, birthDatedate not null, phonevarchar(11) not null, addrnvarchar(5) not null, regDatedate not null, gradechar(1) default null ); CREATE TABLE goodsTbl ( goodsIdnvarchar(12) primary key, goodsNamenvarchar(20) not null, suppliernvarchar(20) not null ); CREATE TABLE sales..