、等值与非等值连接查询 等值连接:连接运算符为= [例33]査询每个学生及其选修课程的情况 SELECT Student. * SC. FROM Student, SC WHERE Student sno SC sno An Introduction to Database SystemAn Introduction to Database System 一、等值与非等值连接查询 ❖等值连接：连接运算符为= [例33] 查询每个学生及其选修课程的情况 SELECT Student.* ，SC.* FROM Student，SC WHERE Student.Sno = SC.Sno；