6、查询学过“01”并且也学过编号“02”课程的同学的学号、姓名。 SELECT st.sid,st.sname FROM student st JOIN score sc ON sc.sid=st.sid AND sc.cid='01' WHERE st.sid IN (SELECT st2.sid FROM student st2 JOIN score sc2 ON sc2.sid=st2.sid AND sc2.cid='02') select a.sid,s.sna...