S?ONSa.KR, M. Implementation of integrity constraints and views by query modification. Pro. ACM-SIGVIOD  Home/Search Document Not in Database Summary Related Articles |
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The Entity-Relationship Model--Toward a Unified View of Data - Peter Pin-Shan Chi (1976) (40 citations) (Correct)
....SUPPORTER EMPLOYEE.PK 1 DEPEN DENT DEPENDENT.PK n EXISTENCE OF DEPENDENT DEPENDS ON EXISTENCE OF SUPPORTER WEAK ENTITY RELATION DEPENDENT NAME FIRST NAME EMPLOYEE.PK THROUGH EMPLOYEE DEPENDENT 3. 3 Implications on Data Integrity Some work has been done on data integrity for other models [8, 14, 16, 28]. With explicit concepts of entity and relationship, the entity relationship model will be useful in understanding and specifying constraints for maintaining data integrity. For example, there are three major kinds of constraints on values: 1) Constraints on allowable values for a value set. This ....
S?ONSa.KR, M. Implementation of integrity constraints and views by query modification. Pro. ACM-SIGVIOD
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