datamodels, Database Management System

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explain thee diffrent types of data models

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Describe the definition of a transaction in SQL  Ans: The SQL transaction starts implicitly. Transactions are finished by either Commit work that commits the transaction and st

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What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or

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Briefly describe the different kinds of users of a DBMS.  Ans: Different sorts of DBMS users are: (a)  Software Engineers: These are the people accountable for developing ap

Domain constraints, Domain Constraints Domain constraints are primarily...

Domain Constraints Domain constraints are primarily formed for defining the logically correct values for an attribute of a relation. The relation allows attributes of a relatio

Equijoin, When every condition appears with equality condition (=) only. c)...

When every condition appears with equality condition (=) only. c)   Natural join (denoted by R*S) When two join attributes have the similar name in both relations. (Tha

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Which is another name for weak entity? Child is another name of weak entity.

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