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Illustrate the statement 'Projection operation distributes over the union operation'. Give an example. Ans: Π L (E 1 ∪ E 2 ) = (Π L (E 1 )) ∪ (Π L (E 2 )) This says th
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
What is schema
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
composite attribute
This assignment concerns the Research database. The database ER model is shown above, where attributes are omitted for clarity. The relational model for the database is: Departm
why are older data base model are being replaced by new data model
Define single valued and multivalued attributes. Single valued attributes: attributes with a single value for a particular entity are known as single valued attributes. Mult
When are two schedules said to be view equivalent? Ans: Two schedules that is denoted as S and S' are said to be view equivalent if the subsequent three conditions are met
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