摘要: 1 CREATE TABLE SC( 2 Sno CHAR(5) , 3 Cno CHAR(3) , 4 Grade int, 5 Primary key (Sno, Cno)), 6 Foreign key (Sno) References Student(Sno), 7 Foreign key (Cno) References Course(Cno))被参照方在参照完整性定... 阅读全文
posted @ 2020-05-26 22:32 淇实是我 阅读(242) 评论(0) 推荐(0) 编辑