摘要: /*查询选修课程‘3-105’且成绩在60到80之间的所有记录。*/SELECT * FROM result WHERE CNO='3-105' AND GRADE > 60 AND GRADE<80;/*查询成绩为85、86或88的记录。*/SELECT * FROM result WHERE G 阅读全文
posted @ 2017-11-29 21:32 何晨昊 阅读(633) 评论(0) 推荐(1) 编辑