【单选题】You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores inf...
【简答题】如果学生表STUDENT是使用下面的SQL语句创建的CREATE TABLE STUDENT (SNO C (4) PRIMARY KEY NOT NULL , SN C (8) , C (2) , AGE N (2) CHECK (AGE>15 AND AGE<30 ))下面的SQL语句中可以正确执行的是A)INSERT INTO STUDENT(SNO,,AGE)VALUES('...