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What is catalog in DBMS?
Catalog - A relational DBMS maintains information about every table and index in which it contains. A catalog is a collection of special tables that stores the descriptive information of each table and index.
Differance between internal and external schema? Internal and external schema: Internal Schema • Describes the physical storage structure • Uses a physical data model External
Describe in brief about DBMS ?
Key to represent relationship amongs tables is called ? A Key that represent the relationship between tables is called Foreign Key.
Describe the two alternatives for specifying structural constraints on relationship kinds? Relationship kinds have certain constraints in which limit the possible combination o
What is a virtual table that draws its data from the result of an SQL SELECT statement? View is a virtual table that draws its data from the result of an SQL SELECT statement.
differences between a classified catalog and a dictionary catalog
i need help with creating database system for a library
Define Hash files organization a. Hashing includes computing the address of a data item by calculating a function on the search key value. b. A hash function h is a functi
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Some disadvantages of File Oriented System ?
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