SQL面试题1

Posted 2020-11-26 wuxiping2019

1.用一条SQL 语句 查询出每门课都大于80 分的学生姓名

mysql> select * from students;
+----------+---------+--------+
| name     | kecheng | fenshu |
+----------+---------+--------+
| zhangsan | yuwen   |     81 |
| zhangsan | shuxue  |     75 |
| lisi     | yuwen   |     76 |
| lisi     | shuxue  |     76 |
| wangwu   | yuwen   |     81 |
| wangwu   | shuxue  |    100 |
| wangwu   | yingyu  |     90 |
+----------+---------+--------+

mysql> select distinct name from students where name not in (select distinct name from students where fenshu<=80);
+--------+
| name |
+--------+
| wangwu |

 

mysql> select name from students group by name having min(fenshu)>80;
+--------+
| name |
+--------+
| wangwu |
+--------+

2.