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Grant: It is used to give database access permission to users. It is of two types
(1) system level permission
(2) Object level permission.
Sequences Sequences: Automatically produce unique numbers Are sharable Are typically used to make a primary key value Replace application code Speed up t
brief history,definition,current trends and future trends if any of data fragmentation
Our company hires independent contractors to install equipment at precise locations across North America. We want to track the installation data and generate reports. The compan
You want to implement following relationships when designing tables. How would you do it? a.) One-to-one b.) One-to-many c.) Many-to-many a.) One-to-One relationship -
Discuss the differences among the candidate keys and the primary key of a relation. Give instance to describe your answer? A candidate key is one that can be used as primary ke
Normal 0 false false false EN-US X-NONE X-NONE
Differentiate strict two phase locking protocol and rigorous two phase locking protocol. In strict two phase locking protocol all exclusive mode locks taken by a transaction is
Consider the following relational schema: Doctor(DName,Reg_no) Patient(Pname, Disease) Assigned_To (Pname,Dname) Give expression in both Tuple calculus and Domain calculus for
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
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