Employee table (EMPLOYEE)

The employee table identifies all employees by an employee number and lists basic personnel information.

The employee table is created with the following CREATE TABLE and ALTER TABLE statements:

CREATE TABLE EMPLOYEE
      (EMPNO       CHAR(6)         NOT NULL,
       FIRSTNME    VARCHAR(12)     NOT NULL,
       MIDINIT     CHAR(1)         NOT NULL,
       LASTNAME    VARCHAR(15)     NOT NULL,
       WORKDEPT    CHAR(3)                 ,
       PHONENO     CHAR(4)                 ,
       HIREDATE    DATE                    ,
       JOB         CHAR(8)                 ,
       EDLEVEL     SMALLINT        NOT NULL,
       SEX         CHAR(1)                 ,
       BIRTHDATE   DATE                    ,
       SALARY      DECIMAL(9,2)            ,
       BONUS       DECIMAL(9,2)            ,
       COMM        DECIMAL(9,2)         
       PRIMARY KEY (EMPNO))

ALTER TABLE EMPLOYEE 
      ADD FOREIGN KEY RED (WORKDEPT) 
      REFERENCES DEPARTMENT 
      ON DELETE SET NULL

ALTER TABLE EMPLOYEE 
      ADD CONSTRAINT NUMBER 
      CHECK (PHONENO >= '0000' AND PHONENO <= '9999')

The following indexes are created:

CREATE UNIQUE INDEX XEMP1 
       ON EMPLOYEE (EMPNO)

CREATE INDEX XEMP2 
       ON EMPLOYEE (WORKDEPT)

The following alias is created for the table:

CREATE ALIAS EMP FOR EMPLOYEE

The table below shows the content of the columns.

Column name	Description
EMPNO	Employee number
FIRSTNME	First name of employee
MIDINIT	Middle initial of employee
LASTNAME	Family name of employee
WORKDEPT	ID of department in which the employee works
PHONENO	Employee telephone number
HIREDATE	Date of hire
JOB	Job held by the employee
EDLEVEL	Number of years of formal education
SEX	Sex of the employee (M or F)
BIRTHDATE	Date of birth
SALARY	Yearly salary in dollars
BONUS	Yearly bonus in dollars
COMM	Yearly commission in dollars