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What is the need for triggers?
Triggers are useful mechanisms for alerting humans or for starting particular tasks automatically when particular conditions are met.
what is the relationship between receipt and owner entities in computer sales and service company
A buyer for a large department store chain must place orders with an athletic shoe manufacturer six months prior to the time the shoes will be sold in the department stores. In par
Express types of information available in MySQL? Information as regards the result of queries: This includes number of records affected by any SELECT or UPDATE or DELETE st
What is Secondary Index While making the index, generally the index table is kept in the primary memory (RAM) and the main table, because of its size is keeps in the secondary
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
explain participation constraints with examples
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
Differentiate between a subquery and a join If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are t
Objectives Define the terms RECOVERY and INTEGRITY; Define Recovery Techniques; Explain Error and Error detection techniques, and Define types of Authorisation.
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