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What functions does a data dictionary perform?
In a (DBMS)data management system, the principal functions performed by the data dictionary are
what is the need of a log in dbms
why three level architecture had been developed/
Define Fifth Normal form is concerned with Ans : Fifth Normal form is concerned with Join dependency.
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
define lock conversion
First Normal Form and second normal form First Normal Form (1NF) A relation is said to be in 1NF if it having no non-atomic values and each row can give a unique combinat
What is the meaning of Data Independence ?
Explain the term- Periodic recomputation Periodic recomputation: Base values are often updated in bunches. Sometimes, it is possible to just recompute all derived attributes p
Objectives After reading this part, you should be able to: Modify, create, and delete database schema objects; Update database using SQL command; Retrieve data f
Define Timestamp ordering Ans In timestamp-based method, a serial order is made among the concurrent transaction by assigning to every transaction a unique nondecreasing number
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