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Column Constraints: NOT NULL, UNIQUE, CHECK, PRIMARY KEY, DEFAULT, REFERENCES, On delete Cascade : Using this key whenever a parent row is removed in a referenced
Question: (a) Discuss the difference between a composite key and a composite attribute. How would each be indicated in an E-R diagram? Support your answer with appropriate exam
what is relationship inheritance and attribute inheritance
Data independence seems that "the application is independent of the access strategy and storage structure of data". In other words, the ability to change the schema definition in o
Explain the uses of deadlock It will lead to deadlock since this is the only place where incoming acknowledgements are processed. Without this code, sender will keep timing ou
Do you have experts of the dbms
Explain in details about the f unctions of DBA ?
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
Can we delete data element, which is being used by table fields. No we cant delete data element.
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