考虑到参照完整性的外码设计,如图所示的student,course,sc三张表的创建顺序应为()。 A: sc,course,student B: sc,student,course C: student,sc,course D: student,course,sc
考虑到参照完整性的外码设计,如图所示的student,course,sc三张表的创建顺序应为()。 A: sc,course,student B: sc,student,course C: student,sc,course D: student,course,sc
在student_course数据库中,用create命令创建student、course、sc数据表(参照课本79-80页)(粘贴命令); (1)为三个表添加主键; (2)course表中cpno为外键,参照course的cno; (3)sc表中外键sno,参照student的sno取值; (4)sc表中外键cno参照course的cno取值; (5)student表中ssex只能取“男”或者“女”; (6)sc表中grade限定大于0小于100;
在student_course数据库中,用create命令创建student、course、sc数据表(参照课本79-80页)(粘贴命令); (1)为三个表添加主键; (2)course表中cpno为外键,参照course的cno; (3)sc表中外键sno,参照student的sno取值; (4)sc表中外键cno参照course的cno取值; (5)student表中ssex只能取“男”或者“女”; (6)sc表中grade限定大于0小于100;
参照学生表student,课程表course和选课关系表sc,要查找“张三”同学选修“法律基础”课的成绩,将涉及关系( )。 A: course,sc B: student course, C: sc student, D: sc student,
参照学生表student,课程表course和选课关系表sc,要查找“张三”同学选修“法律基础”课的成绩,将涉及关系( )。 A: course,sc B: student course, C: sc student, D: sc student,
现有关系student (sno,sname,sex,age)course(cno,cname,credit)sc(sno,cno,socre)查找王燕所选修的课程的课程和成绩,将查询到哪些关系( ) A: student B: course 和student C: student 和sc D: student,course 和sc
现有关系student (sno,sname,sex,age)course(cno,cname,credit)sc(sno,cno,socre)查找王燕所选修的课程的课程和成绩,将查询到哪些关系( ) A: student B: course 和student C: student 和sc D: student,course 和sc
在“查询选修课程号为C04,且成绩在80分以上的所有学生的学号和姓名”的SQL语句中,将使用的表有 A: 仅STUDENT B: 仅STUDENT和COURSE C: 仅STUDENT和SC D: STUDENT、COURSE和SC
在“查询选修课程号为C04,且成绩在80分以上的所有学生的学号和姓名”的SQL语句中,将使用的表有 A: 仅STUDENT B: 仅STUDENT和COURSE C: 仅STUDENT和SC D: STUDENT、COURSE和SC
Choose the correct letter, A, B or C. What kind of skill will the student gain in the course
Choose the correct letter, A, B or C. What kind of skill will the student gain in the course
AYES includes a course on automobile sales. which intended for any student studying in this program.
AYES includes a course on automobile sales. which intended for any student studying in this program.
Physics _____ a course that every student must take. A: have B: has C: is D: are
Physics _____ a course that every student must take. A: have B: has C: is D: are
Which of the following information is NOT the basis of assessment? A: The course documents B: The student’s work C: The student’s self-assessment sheets D: The teacher’s observation notes on the achievement of the student’s linguistic ability
Which of the following information is NOT the basis of assessment? A: The course documents B: The student’s work C: The student’s self-assessment sheets D: The teacher’s observation notes on the achievement of the student’s linguistic ability
Who is the man A: Student advisor. B: Course teacher. C: Admissions officer. D: Department secretary.
Who is the man A: Student advisor. B: Course teacher. C: Admissions officer. D: Department secretary.