创建三张表
雇员表：
mysql> create table emp(empmo numeric(4) not null,ename varchar(10),job varchar(9),mgr numeric(4),hiredate datetime,sal numeric(7, 2),comm numeric(7, 2),deptno numeric(2)); Query OK, 0 rows affected (0.05 sec) mysql> insert into emp values(7369,"SMITH","CLERK",7902,'1980-12-17',800, null, 20); Query OK, 1 row affected (0.02 sec) insert into emp values (7499, 'ALLEN', 'SALESMAN', 7698, '1981-02-20', 1600, 300, 30); insert into emp values (7521, 'WARD', 'SALESMAN', 7698, '1981-02-22', 1250, 500, 30); insert into emp values (7566, 'JONES', 'MANAGER', 7839, '1981-04-02', 2975, null, 20); insert into emp values (7654, 'MARTIN', 'SALESMAN', 7698, '1981-09-28', 1250, 1400, 30); insert into emp values (7698, 'BLAKE', 'MANAGER', 7839, '1981-05-01', 2850, null, 30); insert into emp values (7782, 'CLARK', 'MANAGER', 7839, '1981-06-09', 2450, null, 10); insert into emp values (7788, 'SCOTT', 'ANALYST', 7566, '1982-12-09', 3000, null, 20); insert into emp values (7839, 'KING', 'PRESIDENT', null, '1981-11-17', 5000, null, 10); insert into emp values (7844, 'TURNER', 'SALESMAN', 7698, '1981-09-08', 1500, 0, 30); insert into emp values (7876, 'ADAMS', 'CLERK', 7788, '1983-01-12', 1100, null, 20); insert into emp values (7900, 'JAMES', 'CLERK', 7698, '1981-12-03', 950, null, 30); insert into emp values (7902, 'FORD', 'ANALYST', 7566, '1981-12-03', 3000, null, 20); insert into emp values (7934, 'MILLER', 'CLERK', 7782, '1982-01-23', 1300, null, 10);
部门表：--部门编号，部门名称，部门所在位置
mysql> create table dept(deptno numeric(2),dname varchar(14),loc varchar(13)); Query OK, 0 rows affected (0.03 sec) mysql> insert into dept values (10, 'ACCOUNTING', 'NEW YORK'); Query OK, 1 row affected (0.01 sec) mysql> insert into dept values (20, 'RESEARCH', 'DALLAS'); Query OK, 1 row affected (0.05 sec) mysql> insert into dept values (30, 'SALES', 'CHICAGO'); Query OK, 1 row affected (0.01 sec) mysql> insert into dept values (40, 'OPERATIONS', 'BOSTON'); Query OK, 1 row affected (0.01 sec)
工资等级表：--等级，这个等级里面的最低工资，这个等级里面的最高工资
mysql> create table salgrade (grade numeric,losal numeric,hisal numeric); Query OK, 0 rows affected (0.08 sec) mysql> insert into salgrade values (1,700,1200); Query OK, 1 row affected (0.00 sec) mysql> insert into salgrade values (2,1201,1400); Query OK, 1 row affected (0.04 sec) mysql> insert into salgrade values (3,1401, 2000); Query OK, 1 row affected (0.01 sec) mysql> insert into salgrade values (4,2001, 3000); Query OK, 1 row affected (0.06 sec) mysql> insert into salgrade values (5,3001, 9999); Query OK, 1 row affected (0.01 sec)
select * from 表名; --查询出该表名下的所有数据
* 代表所有字段
select [字段列表(可以是多个)，表达式，函数] from 表名;
mysql> select * from emp; +-------+--------+-----------+------+---------------------+---------+---------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+---------------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 00:00:00 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 00:00:00 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 00:00:00 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 00:00:00 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 00:00:00 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 00:00:00 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+---------------------+---------+---------+--------+ 14 rows in set (0.00 sec)
查询某些字段数据
mysql> select empmo,ename,sal from emp; +-------+--------+---------+ | empmo | ename | sal | +-------+--------+---------+ | 7369 | SMITH | 800.00 | | 7499 | ALLEN | 1600.00 | | 7521 | WARD | 1250.00 | | 7566 | JONES | 2975.00 | | 7654 | MARTIN | 1250.00 | | 7698 | BLAKE | 2850.00 | | 7782 | CLARK | 2450.00 | | 7788 | SCOTT | 3000.00 | | 7839 | KING | 5000.00 | | 7844 | TURNER | 1500.00 | | 7876 | ADAMS | 1100.00 | | 7900 | JAMES | 950.00 | | 7902 | FORD | 3000.00 | | 7934 | MILLER | 1300.00 | +-------+--------+---------+ 14 rows in set (0.00 sec)
select 表达式[算术表达式] from 表名; 查询每个人的年新；可以使用：加减乘除(+、-、*、)
mysql> select ename,sal*12 from emp; +--------+----------+ | ename | sal*12 | +--------+----------+ | SMITH | 9600.00 | | ALLEN | 19200.00 | | WARD | 15000.00 | | JONES | 35700.00 | | MARTIN | 15000.00 | | BLAKE | 34200.00 | | CLARK | 29400.00 | | SCOTT | 36000.00 | | KING | 60000.00 | | TURNER | 18000.00 | | ADAMS | 13200.00 | | JAMES | 11400.00 | | FORD | 36000.00 | | MILLER | 15600.00 | +--------+----------+ 14 rows in set (0.01 sec)
取余[%]：什么是取余？求余数能整除的余数为0，不能整除的余数为剩下的余就是整除剩下的余数。
mysql> select ename,sal%100 from emp; +--------+---------+ | ename | sal%100 | +--------+---------+ | SMITH | 0.00 | | ALLEN | 0.00 | | WARD | 50.00 | | JONES | 75.00 | | MARTIN | 50.00 | | BLAKE | 50.00 | | CLARK | 50.00 | | SCOTT | 0.00 | | KING | 0.00 | | TURNER | 0.00 | | ADAMS | 0.00 | | JAMES | 50.00 | | FORD | 0.00 | | MILLER | 0.00 | +--------+---------+ 14 rows in set (0.00 sec)
去重[distinct]：
mysql> select deptno from emp; +--------+ | deptno | +--------+ | 20 | | 30 | | 30 | | 20 | | 30 | | 30 | | 10 | | 20 | | 10 | | 30 | | 20 | | 30 | | 20 | | 10 | +--------+ 14 rows in set (0.00 sec) mysql> select distinct deptno from emp; +--------+ | deptno | +--------+ | 20 | | 30 | | 10 | +--------+ 3 rows in set (0.00 sec)
条件查询：where条件表达式等值比较 大于 小于 大于等于 小于等于 不等于
等值比较：比较数值的时候直接比较
mysql> select * from emp where deptno = 10; +-------+--------+-----------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+---------------------+---------+------+--------+ | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 00:00:00 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+---------------------+---------+------+--------+ 3 rows in set (0.00 sec)
比较字符串的时候必须有对应的引号
mysql> select ename from emp where ename = "CLARK"; +-------+ | ename | +-------+ | CLARK | +-------+ 1 row in set (0.00 sec) mysql> select * from emp where ename = "CLARK"; +-------+-------+---------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+---------+------+---------------------+---------+------+--------+ | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | +-------+-------+---------+------+---------------------+---------+------+--------+ 1 row in set (0.00 sec) mysql> select * from emp where hiredate = '1981'; Empty set, 2 warnings (0.00 sec) mysql> select * from emp where hiredate = '1981-06-09'; +-------+-------+---------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+---------+------+---------------------+---------+------+--------+ | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | +-------+-------+---------+------+---------------------+---------+------+--------+ 1 row in set (0.00 sec) mysql> select * from emp where hiredate = '1981/06/09'; +-------+-------+---------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+---------+------+---------------------+---------+------+--------+ | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | +-------+-------+---------+------+---------------------+---------+------+--------+ 1 row in set (0.01 sec)
大于比较：
mysql> select * from emp where sal > '2000'; +-------+-------+-----------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+-----------+------+---------------------+---------+------+--------+ | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | +-------+-------+-----------+------+---------------------+---------+------+--------+ 6 rows in set (0.00 sec)
大于等于比较：
mysql> select * from emp where sal >= '2450'; +-------+-------+-----------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+-----------+------+---------------------+---------+------+--------+ | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | +-------+-------+-----------+------+---------------------+---------+------+--------+ 6 rows in set (0.00 sec)
不等于比较：
mysql> select * from emp where sal <> '2450'; +-------+--------+-----------+------+---------------------+---------+---------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+---------------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 00:00:00 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 00:00:00 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 00:00:00 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 00:00:00 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 00:00:00 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 00:00:00 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+---------------------+---------+---------+--------+ 13 rows in set (0.03 sec)
多条件查询：并且and查询大于1600并且小于等于3000的
mysql> select * from emp where sal > 1600 and sal <= 3000; +-------+-------+---------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+---------+------+---------------------+---------+------+--------+ | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | +-------+-------+---------+------+---------------------+---------+------+--------+ 5 rows in set (0.00 sec)
查询大于1600并且小于等于3000的数据并且是10号部门的
mysql> select * from emp where sal >1600 and sal <= 3000 and deptno = 10; +-------+-------+---------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+---------+------+---------------------+---------+------+--------+ | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | +-------+-------+---------+------+---------------------+---------+------+--------+ 1 row in set (0.00 sec)
或者 or （or也可以写多个）大于3000小于1000
mysql> select * from emp where sal > 3000 or sal < 1000; +-------+-------+-----------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+-----------+------+---------------------+---------+------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 00:00:00 | 950.00 | NULL | 30 | +-------+-------+-----------+------+---------------------+---------+------+--------+ 3 rows in set (0.00 sec)
in关键字：代表在这个取值中只要有一个匹配就是符合条件
mysql> select * from emp where sal = 800 or sal = 950 or sal = 1600; +-------+-------+----------+------+---------------------+---------+--------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+----------+------+---------------------+---------+--------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 00:00:00 | 950.00 | NULL | 30 | +-------+-------+----------+------+---------------------+---------+--------+--------+ 3 rows in set (0.00 sec) mysql> select * from emp where sal in (800,950,1600); +-------+-------+----------+------+---------------------+---------+--------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+----------+------+---------------------+---------+--------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 00:00:00 | 950.00 | NULL | 30 | +-------+-------+----------+------+---------------------+---------+--------+--------+ 3 rows in set (0.00 sec)
in与and
mysql> select * from emp where sal in (800,950,1600) and deptno <> 30; +-------+-------+-------+------+---------------------+--------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+-------+------+---------------------+--------+------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | +-------+-------+-------+------+---------------------+--------+------+--------+ 1 row in set (0.00 sec)
not in关键字不在这个范围区间之内的
mysql> select * from emp where sal not in (800,950,1600); +-------+--------+-----------+------+---------------------+---------+---------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+---------------------+---------+---------+--------+ | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 00:00:00 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 00:00:00 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 00:00:00 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 00:00:00 | 1100.00 | NULL | 20 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 00:00:00 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+---------------------+---------+---------+--------+ 11 rows in set (0.03 sec)
between关键字相当于大于等于，小于等于。
mysql> select * from emp where sal >= 1600 and sal <=3000; +-------+-------+----------+------+---------------------+---------+--------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+----------+------+---------------------+---------+--------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | +-------+-------+----------+------+---------------------+---------+--------+--------+ 6 rows in set (0.00 sec) mysql> select * from emp where sal between 1600 and 3000; +-------+-------+----------+------+---------------------+---------+--------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+----------+------+---------------------+---------+--------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | +-------+-------+----------+------+---------------------+---------+--------+--------+ 6 rows in set (0.00 sec)
空永远不等于空null 和 null 做等值判断时永远是假;判断一个字段数值是否是空需要用到关键字 is
mysql> select * from emp where comm is not null;--判断一个字段的数值不为null需要用到关键 +-------+--------+----------+------+---------------------+---------+---------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+----------+------+---------------------+---------+---------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 00:00:00 | 1250.00 | 500.00 | 30 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 00:00:00 | 1250.00 | 1400.00 | 30 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 00:00:00 | 1500.00 | 0.00 | 30 | +-------+--------+----------+------+---------------------+---------+---------+--------+ 4 rows in set (0.00 sec)
显示查询询列为空的数据
mysql> select * from emp where comm is null; +-------+--------+-----------+------+---------------------+---------+------+--------+ | empmo | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+---------------------+---------+------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 00:00:00 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 00:00:00 | 5000.00 | NULL | 10 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 00:00:00 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 00:00:00 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 00:00:00 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+---------------------+---------+------+--------+ 10 rows in set (0.02 sec)