对于教学数据库的三个基本表: 学生 S(S#,SNAME,AGE,SEX) 学习 SC(S#...答:怎么出完题目就不见人了,也不来确认??1,select s,sname from S where age<22 and sex='女';2,select count(*) from SC;3,select sname,age where sex='男' and age>(select max(age) from S where sex='女');4,insert into S values('S9','WU',18);5,delete from SC where...