摘要:
#--学生表 create table student( s_id vaechar(20), s_name vaechar(20) not NULL, s_birth vaechar(20) not NULL, s_sex vaechar(10) not NULL, constraint pk_student PRIMARY KEY (s_id)) #-... 阅读全文
摘要:
#--学生表 create table student( s_id vaechar(20), s_name vaechar(20) not NULL, s_birth vaechar(20) not NULL, s_sex vaechar(10) not NULL, constraint pk_student PRIMARY KEY (s_id)) #-... 阅读全文