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Write short notes on Schema diagram.
A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears as a box with attributes listed inside it and the relation name above it.
explain in detail about time stamp orderting/
what are the purposes of dbms in details
Problem: (a) Data mining is one of the best ways to analyse data and using software techniques, hidden and unexpected patterns and relationships in sets of data can be extrac
Every simple attribute of an entity type have a possible set of values that can be attached to it. This is known as the domain of an attribute. An attribute cannot have a value out
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
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
wh
What are the advantages of having an index structure? Ans: The index structures commonly provide secondary access paths, which offer alternative ways of accessing the reco
Define average seek time. The average seek time is the average of the seek times, calculated over a sequence of random requests.
Define query optimization. Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
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