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What is schema
What is an Index? An index is a small table having only two columns. The first column has a copy of the primary or candidate key of a table and the second column having a set o
In which format database schema is written ? Data base schema is written in the DDL format.
Explain the concepts of relational data model? Relational Data Model - The relational model was first introduced through Prof. E.F. Codd of the IBM Research in the year 1970
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
explain ER Modeling?
external and internal mapping with examples
Represent the following scenarios with E-R diagrams drawn using the ER Assistant software. The diagrams should indicate cardinality and optionality of relationships. Transform each
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
The scenario You have been approached to design and implement a prototype of a distributed information system for a national car part retail outlet chain. The company comprises
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