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What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
In a Hierarchical model of data records are organized ? In the hierarchical model of data records are organized as Tree structure.
Foreign Keys and NULL Let us take the relation: DEPT DEPT ID DNAME BUDGET D1 M
Q. What is relational algebra and calculus? Explain the relational algebra operators :- Selection and predicate, set operation, joins and division. Sol. Relational Algebra
Replicating Data One approach that may support efficient access to dissimilar applications as above may be to give access to every of the applications from dissimilar replicate
Data Control The data control mostly refers to commands that permit system and data privileges to be passed to several users. These commands are usually available to database admi
Hi I have got an assignment for making an er diagram for market management software can any budy help me?
Which is another name for weak entity? Child is another name of weak entity.
What is a view? Make a view of EMP table named DEPT 20, to display the employees in department 20 and their annual salary. Ans: View is a virtual table that does not consist
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
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