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Describe the algorithm for updating indices for a single level index when a record is
(i) Inserted (ii) deleted
What will be the modification if there are multilevel indices?
Ans: Inserted: The time it acquires to insert a new data item. This value involves the time it takes to find out the correct place to insert the new data item, also the time it takes to update the index structure.
Deleted: The time it receives to delete a data item. This value involves the time it takes to find the item to be deleted, also the time it takes to update the index structure.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
data models are being replaced over years. Reasons and why does that happen?
Although, the essential features of E-R diagrams are enough to design many database situations. Though, with more difficult relations and advanced database applications, it is need
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
why are older data models are being replaced by new data models
Project Description: I would like to get a database of a website which has clients email name and phone number. If you are able to get information from a website, by entering
what characterizes the levels in RAID technology
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
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1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al
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