Error when inserting values to an employee table !

[manager00104]

Hi,

Can someone help me out with this ?

The problem is When I want to add :

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7499 ALLEN SALESMAN 7698 15-AUG-98 1600 30
7521 WARD SALESMAN 7698 26-MAR -96 1550 300 30
7782 CLARK MANAGER 7839 10-APR-97 1250 10
7288 SCOTT ANALYST 7566 14-MAY-99 1300 20

the SQL code for individual insertions are:

INSERT INTO emp VALUES
(7499),'ALLEN','SALESMAN',7698,'15-AUG-98,1600,NULL,30);

INSERT INTO emp VALUES
(7521),'WARD','SALESMAN',7698,'26-MAR-96,1550,300,30);

INSERT INTO emp VALUES
(7782),'CLARK','MANAGER',7839,'10-APR-97,1250,NULL,10);

INSERT INTO emp VALUES
(7288),'SCOTT','ANALYST',7566,'14-MAY-99,1300,NULL,20);

But When I eventually type them out in the console and enter

This error pops up :
ERROR:
0RA-01756: quoted string not properly terminated


Can someone explain to me what this means ?

Thanks,

Kind Regards,

Manager00104,