[TOC]

### 1.查找部门30中员工的详细信息。

```

select * from emp where deptno = 30;

```

### 2.找出从事clerk工作的员工的编号、姓名、部门号。

```

select empno,ename,deptno from emp where job = 'clerk';

```

### 3.检索出奖金多于基本工资的员工信息。

```

select * from emp where comm > sal;

```

### 4.检索出奖金多于基本工资60%的员工信息。

```

select * from emp where comm > sal * 0.6;

```

### 5.找出10部门的经理、20部门的职员 的员工信息。

```

select * from emp where deptno = 10 and job='MANAGER' or deptno = 20 and job = 'CLERK';

```

### 6.找出10部门的经理、20部门的职员 或者既不是经理也不是职员但是工资高于2000元的员工信息。

```

select * from emp

where (deptno = 10 and job='MANAGER')

or (deptno = 20 and job = 'CLERK')

or (job!='MANAGER' and job != 'CLERK' and sal > 2000) ;

// or (job not in ('MANAGER','CLERK' and sal > 2000);

```

### 7.找出获得奖金的员工的工作。

```

select * from emp where comm > 0;

```

### 8.找出奖金少于100或者没有获得奖金的员工的信息。

```

select * from emp where comm < 100 or comm is null;

```

### 9.找出姓名以A、B、S开始的员工信息。

```

select * from emp where ename like 'A%' or ename like 'B%' or ename like 'S%';

```

### 10.找到名字长度为6个字符的员工信息。

```

select * from emp where length(ename) = 6;

// select * from emp where ename like '______';

```

### 11.名字中不包含R字符的员工信息。

```

select * from emp where ename not like '%R%';

```

### 12.返回员工的详细信息并按姓名排序。

```

select * from emp order by ename asc;

```

### 13.返回员工的信息并按工作降序工资升序排列。

```

select * from emp order by job desc,sal asc;

```

### 14.计算员工的日薪(按30天)。

```

select ename,sal/30 as '日薪' from emp;

// select ename,truncate(sal/30,2) '日薪' from emp;

```

### 15.找出姓名中包含A的员工信息。

```

select * from emp where ename like '%A%';

```