Navathe Dbms Ppt Chapter 2 ((top)) Jun 2026

Object integrity: That ensures which every object instance has a exclusive symbol. Reference completeness: This assures what associations amid items stay valid.

1: Single occurrence 0..1: Zilch or single occurrence 1..1: Sole occurrence (mandatory) 0..N: None or extra occurrences 1..N: Sole or extra occurrences

Amount remains a standard concerning the quantity comprising occurrences about an item which would join within a connection. This appears depicted utilizing the following sign: navathe dbms ppt chapter 2

Principal key: It remains a exclusive symbol intended an object case. External cipher: This remains a code which cites the principal cipher concerning different object.

Boundaries stay rulings what exist linked to the data inside a folder in the direction of ensure its completeness combined with consistency. Samples containing boundaries comprise: Object integrity: That ensures which every object instance

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Values alongside Restrictions Codes combined with boundaries exist applied to guarantee the integrity together with stability containing the data within a archive. A value remains a set comprising characteristics that distinctively names an entity case. Presently exist various sorts containing ciphers, comprising: navathe dbms ppt chapter 2

1: Individual instance 0..1: None alternatively single case 1..1: Sole case necessary 0..N: None or else additional instances 1..N: Individual alternatively extra occurrences