Understanding Relational Database Instance: Key Concepts and Examples

Rumman Ansari   Software Engineer   2024-07-19 02:36:52   6561  Share
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A relational database instance s of relational database schema S = {R1, R2,……,Rm) is a set of relation instances {r1, r2,……,rm} such that each relation instance ri is a state of corresponding relation schema Ri. Each relation instance must satisfy the integrity constraints specified in the relation schema.

For example, a relational database instance corresponding to the Online Book database is shown in below-



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