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Define- relational algebra.
The relational algebra is a procedural query language. It having of a set of operations that take one or two relation as input and make a new relation as output.
explain participation constraints with examples
(a) Explain the three types of potential mistake which could occur if concurrency control is not properly enforced in the database system. Support your answer with appropriate ex
Indexed (Indexed Sequential) File Organisation It organises the file like a big dictionary, i.e., records are kept in order of the key but an index is stored which also allows
Timestamps For Read operations: If TS (T) If TS (T) >= W-timestamp (Q), then the transaction T is trying to read a value of data item Q which has been written and committed
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
1) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pict
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Examine about the Behavioural Diagrams The main objective of behavioural diagrams is to visualize, specify, construct and document dynamic aspects of a system. The interactio
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
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
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