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Define Deadlock recovery measures To recover from deadlock, the cycle in the wait-for-graph should be broken. The common technique of doing this is to rollbac
Benefits: It limits data access. It makes difficult queries look easy. It permits data independence. It presents dissimilar views of the similar data.
composite attribute
What is schema
What is foreign key? A relation schema r1 derived from an ER schema may contain among its attributes the primary key of another relation schema r2.this attribute is known as a
What is a candidate key? Minimal super keys are known as candidate keys.
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
how to operate database in access ?
What is Trigger? A trigger is a SQL procedure that initiates an action when an event (INSERT, DELETE or UPDATE) occurs. Triggers are kept in and managed by the DBMS. Triggers a
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