mysql语句练习-来源考试

1、
CREATE TABLE dept
(
d_no         INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
d_name       VARCHAR(50),
d_location     VARCHAR(100)
);

CREATE TABLE employee
(
e_no        INT NOT NULL PRIMARY KEY,
e_name      VARCHAR(100) NOT NULL,
e_gender    CHAR(2) NOT NULL,
dept_no    INT NOT NULL,
e_job       VARCHAR(100) NOT NULL,
e_salary   SMALLINT NOT NULL,
hireDate   DATE,
CONSTRAINT dno_fk FOREIGN KEY(dept_no)
REFERENCES dept(d_no)
);
2、
向dept表中插入数据，SQL语句如下：
INSERT INTO dept 
VALUES (10, 'ACCOUNTING', 'ShangHai'),
(20, 'RESEARCH ', 'BeiJing '),
(30, 'SALES ', 'ShenZhen '),
(40, 'OPERATIONS ', 'FuJian ');
向employee表中插入数据，SQL语句如下：
INSERT INTO employee 
VALUES (1001, 'SMITH', 'm',20, 'CLERK',800,'2005-11-12'),
(1002, 'ALLEN', 'f',30, 'SALESMAN', 1600,'2003-05-12'),
(1003, 'WARD', 'f',30, 'SALESMAN', 1250,'2003-05-12'),
(1004, 'JONES', 'm',20, 'MANAGER', 2975,'1998-05-18'),
(1005, 'MARTIN', 'm',30, 'SALESMAN', 1250,'2001-06-12'), 
(1006, 'BLAKE', 'f',30, 'MANAGER', 2850,'1997-02-15'),
(1007, 'CLARK', 'm',10, 'MANAGER', 2450,'2002-09-12'),
(1008, 'SCOTT', 'm',20, 'ANALYST', 3000,'2003-05-12'),
(1009, 'KING', 'f',10, 'PRESIDENT', 5000,'1995-01-01'),
(1010, 'TURNER', 'f',30, 'SALESMAN', 1500,'1997-10-12'),
(1011, 'ADAMS', 'm',20, 'CLERK', 1100,'1999-10-05'),
(1012, 'JAMES', 'm',30, 'CLERK', 950,'2008-06-15');
3、
SELECT dept_no, MAX(e_salary) FROM employee GROUP BY dept_no;
4、
SELECT d_no, d_location  FROM dept WHERE d_no=
(SELECT dept_no FROM employee WHERE e_name='BLAKE');
5、
SELECT e_no, e_name, dept_no, d_name,d_location
FROM employee, dept WHERE dept.d_no=employee.dept_no;
6、
SELECT dept_no, AVG(e_salary) FROM employee GROUP BY dept_no;
7、
SELECT * FROM employee WHERE e_name rlike '^[as]';
8、
SELECT e_name,dept_no, e_salary 
FROM employee ORDER BY dept_no DESC, e_salary DESC;
9、
SELECT * FROM employee WHERE e_salary BETWEEN 800 AND 2500;
10、
SELECT * FROM employee where YEAR(CURDATE()) -YEAR(hireDate) >= 10;