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Define an abstraction by which relationships are treated as higher level entities
Ans: Aggregation.
It is an abstraction by which relationships are treated as higher level entities Aggregation. (In ER diagram, aggregation is utilized to denote a relationship as an entity set.)
Column Constraints: NOT NULL, UNIQUE, CHECK, PRIMARY KEY, DEFAULT, REFERENCES, On delete Cascade : Using this key whenever a parent row is removed in a referenced
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What is a trigger
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Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
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In this practical assignment, we will run through a complete database application development cycle, starting with the schema design, from an initial data import to database applic
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