CONSTRAINT CHECK

CREATE TABLE EMPLOYEE_PAY_TBL
(
EMP_ID        VARCHAR(9)    NOT NULL    primary key,
POSITION    VARCHAR(15)    NOT NULL,
DATE_HIRE    DATE,
PAY_RATE    DECIMAL(4,2),
DATE_LAST_RAISE    DATE,
SALARY        DECIMAL(8,2),
BONUS        DECIMAL(6,2),
CONSTRAINT EMP_FK FOREIGN KEY (EMP_ID) REFERENCES EMPLOYEE_TBL (EMP_ID)    
);

ALTER TABLE EMPLOYEE_PAY_TBL ADD CONSTRAINT CHK_PAY_RATE CHECK ( PAY_RATE > 10.00 );

SELECT * FROM EMPLOYEE_PAY_TBL;
+-----------+---------------+------------+----------+-----------------+----------+---------+
| EMP_ID    | POSITION      | DATE_HIRE  | PAY_RATE | DATE_LAST_RAISE | SALARY   | BONUS   |
+-----------+---------------+------------+----------+-----------------+----------+---------+
| 213764555 | SALES MANAGER | 2004-08-14 |     NULL | 2009-08-01      | 30000.00 | 2000.00 |
| 220984332 | SHIPPER       | 2006-07-22 |    11.00 | 1999-07-01      |     NULL |    NULL |
| 311549902 | MARKETING     | 1999-05-23 |     NULL | 2009-05-01      | 40000.00 |    NULL |
| 313782439 | SALSEMAN      | 2007-06-28 |     NULL | NULL            | 20000.00 | 1000.00 |
| 442346889 | TEAM LEADER   | 2000-06-17 |    14.75 | 2009-06-01      |     NULL |    NULL |
| 443679012 | SHIPPER       | 2001-01-14 |    15.00 | 1999-01-01      |     NULL |    NULL |
+-----------+---------------+------------+----------+-----------------+----------+---------+

DESCRIBE EMPLOYEE_PAY_TBL;
+-----------------+--------------+------+-----+---------+-------+
| Field           | Type         | Null | Key | Default | Extra |
+-----------------+--------------+------+-----+---------+-------+
| EMP_ID          | varchar(9)   | NO   | PRI | NULL    |       |
| POSITION        | varchar(15)  | NO   |     | NULL    |       |
| DATE_HIRE       | date         | YES  |     | NULL    |       |
| PAY_RATE        | decimal(4,2) | YES  |     | NULL    |       |
| DATE_LAST_RAISE | date         | YES  |     | NULL    |       |
| SALARY          | decimal(8,2) | YES  |     | NULL    |       |
| BONUS           | decimal(6,2) | YES  |     | NULL    |       |
+-----------------+--------------+------+-----+---------+-------+