7. The table persons has been created which has the attributes:
•ID_NUM & COMPANY_ID with datatype NUMBER. ID_NUM cannot
have a null value and should be unique i.e. serves as a PRIMARY KEY.
•LAST_NAME & FIRST_NAME have VARCHAR2 datatype.
•COMPANY stores the name of the firm where the person works.
•WORTH is the total amount that the company has.
•DESIGNATION is the rank or position that the person has
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8. The table info has INFO_NUM serving as the PRIMARY KEY
ID_NUM is the FOREIGN KEY ( actually PRIMARY KEY of table persons ).
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