SQL 面试题 二 (有关排序、模糊查询)

一、给定一张表1，根据要求进行排序：

+--------+----------+---------+----------+
| emp_id | emp_name | dept_id | emp_wage |
+--------+----------+---------+----------+
| 1001 | toni | 1 | 32000 |
| 1002 | lMcy | 3 | 2500 |
| 1003 | toM | 4 | 3200 |
| 1004 | mamy | 2 | 9500 |
+--------+----------+---------+----------+

1.根据emp_wage，员工工资升序排序：mysql> select * from employee order by emp_wage ASC; （注：ASC=ascending升序）

+--------+----------+---------+----------+
| emp_id | emp_name | dept_id | emp_wage |
+--------+----------+---------+----------+
| 1002 | lMcy | 3 | 2500 |
| 1003 | toM | 4 | 3200 |
| 1004 | mamy | 2 | 9500 |
| 1001 | toni | 1 | 32000 |
+--------+----------+---------+----------+

2.根据emp_id降序排序：mysql> select * from employee order by emp_id DESC; （注：DESC=descending降序）

+--------+----------+---------+----------+
| emp_id | emp_name | dept_id | emp_wage |
+--------+----------+---------+----------+
| 1004 | mamy | 2 | 9500 |
| 1003 | toM | 4 | 3200 |
| 1002 | lMcy | 3 | 2500 |
| 1001 | toni | 1 | 32000 |
+--------+----------+---------+----------+

二、根据以上表1，根据要求进行模糊查询

1、不区分大小写查询员工名中含有m的员工资料：mysql> select * from employee where emp_name like '%m%';

+--------+----------+---------+----------+
| emp_id | emp_name | dept_id | emp_wage |
+--------+----------+---------+----------+
| 1002 | lMcy | 3 | 2500 |
| 1003 | toM | 4 | 3200 |
| 1004 | mamy | 2 | 9500 |
+--------+----------+---------+----------+

2、查询员工名中含有大写M的员工资料：mysql> select * from employee where emp_name like binary('%M%');

+--------+----------+---------+----------+
| emp_id | emp_name | dept_id | emp_wage |
+--------+----------+---------+----------+
| 1002 | lMcy | 3 | 2500 |
| 1003 | toM | 4 | 3200 |
+--------+----------+---------+----------+

3、查询员工名中以“t”打头以“i”结尾的员工资料：mysql> select * from employee where emp_name like 't%' and emp_name like '%i';

+--------+----------+---------+----------+
| emp_id | emp_name | dept_id | emp_wage |
+--------+----------+---------+----------+
| 1001 | toni | 1 | 32000 |
+--------+----------+---------+----------+

4、查询员工名中第三位是大写“M”的员工资料：mysql> select * from employee where emp_name like binary('%_ _M%');

+--------+----------+---------+----------+
| emp_id | emp_name | dept_id | emp_wage |
+--------+----------+---------+----------+
| 1003 | toM | 4 | 3200 |
+--------+----------+---------+----------+