– 10、查询学过编号为"01"但是没有学过编号为"02"的课程的同学的信息
SELECT st.*
FROM student st
WHERE st.s_id IN(
SELECT sc.s_id FROM score sc WHERE sc.c_id='01') AND
st.s_id NOT IN (
SELECT sc.s_id FROM score sc WHERE sc.c_id='02' )
– 10、查询学过编号为"01"但是没有学过编号为"02"的课程的同学的信息
SELECT st.*
FROM student st
WHERE st.s_id IN(
SELECT sc.s_id FROM score sc WHERE sc.c_id='01') AND
st.s_id NOT IN (
SELECT sc.s_id FROM score sc WHERE sc.c_id='02' )