day34作业
目录
mysql> desc db;
+--------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | | none | |
| age | int(10) unsigned | NO | | NULL | |
| salary | decimal(10,2) | NO | | NULL | |
| career | varchar(255) | NO | | none | |
+--------+------------------+------+-----+---------+----------------+
5 rows in set (0.00 sec)
mysql> insert into db (name,age,salary,career) values ('cxk',18,9500,'teacher'),('lxlt',58,1500,'teacher'),('xfxx',25,35000,'teacher'),('xxx',30,18000,'teacher'),('qwe',55,30050,'teacher');
Query OK, 5 rows affected (0.00 sec)
Records: 5 Duplicates: 0 Warnings: 0
mysql> select * from db;
+----+------+-----+----------+---------+
| id | name | age | salary | career |
+----+------+-----+----------+---------+
| 1 | cxk | 18 | 9500.00 | teacher |
| 2 | lxlt | 58 | 1500.00 | teacher |
| 3 | xfxx | 25 | 35000.00 | teacher |
| 4 | xxx | 30 | 18000.00 | teacher |
| 5 | qwe | 55 | 30050.00 | teacher |
+----+------+-----+----------+---------+
5 rows in set (0.00 sec)
查看岗位是teacher的员工姓名、年龄
mysql> select name,age from db where career='teacher';
+------+-----+
| name | age |
+------+-----+
| cxk | 18 |
| lxlt | 58 |
| xfxx | 25 |
| xxx | 30 |
| qwe | 55 |
+------+-----+
5 rows in set (0.00 sec)
查看岗位是teacher且年龄大于30岁的员工姓名、年龄
mysql> select name,age from db where career='teacher' and age >30;
+------+-----+
| name | age |
+------+-----+
| lxlt | 58 |
| qwe | 55 |
+------+-----+
2 rows in set (0.00 sec)
查看岗位是teacher且薪资在9000-1000范围内的员工姓名、年龄、薪资
mysql> select name,age,salary from db where career='teacher' and salary between
-> 9000 and 10000;
+------+-----+---------+
| name | age | salary |
+------+-----+---------+
| cxk | 18 | 9500.00 |
+------+-----+---------+
1 row in set (0.00 sec)
查看岗位描述不为NULL的员工信息
mysql> select name,age,salary from db where career='teacher' and salary between
-> 9000 and 10000;
+------+-----+---------+
| name | age | salary |
+------+-----+---------+
| cxk | 18 | 9500.00 |
+------+-----+---------+
1 row in set (0.00 sec)
查看岗位是teacher且薪资是10000或9000或30000的员工姓名、年龄、薪资
mysql> select name,age,salary from db where career='teacher' and salary in (10000,9000,30000);
Empty set (0.00 sec)
查看岗位是teacher且薪资不是10000或9000或30000的员工姓名、年龄、薪资
mysql> select name,age,salary from db where career='teacher' and salary not in
-> (10000,9000,30000);
+------+-----+----------+
| name | age | salary |
+------+-----+----------+
| cxk | 18 | 9500.00 |
| lxlt | 58 | 1500.00 |
| xfxx | 25 | 35000.00 |
| xxx | 30 | 18000.00 |
| qwe | 55 | 30050.00 |
+------+-----+----------+
5 rows in set (0.00 sec)
查看岗位是teacher且名字是jin开头的员工姓名、年薪
mysql> select name,salary from db where career='teacher' and name like 'jin%';
Empty set (0.00 sec)
