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In which format database schema is written ? Data base schema is written in the DDL format.
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Saving Derived Attributes to Avoid Re-computation Data that is derived from other data should be stored in the computed form to avoid re-computation. For this, we could define
What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa
Order by clause By using this rows can be sorted It is used in the last portion of select statement By default it gets ascending order DESC: is used
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What is recursive closure? Why is it not possible to describe this operation in relational algebra? Recursive closure is applied to recursive relationship. An instance of rec
Define the Attribute Inheritance The attributes of a higher level entity set are inherited through a lower level entity set made by specialization-generalization hierarchy. Nam
State the Steps of Object Design Object design is a very iterative process in which various classes, relationships among objects are added when you move from one level to
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