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Atomicity: Either all functions are laid out or none are. Users could not have to think about the effect of incomplete operations. DBMS ensures this by undoing the functions of incomplete operations.
Aggregation: A concept which is needed to model a relationship between relationships and a collection of entities. It is used when we require express a relationship among relationships.
Name the three major groups of files on disk that devolve a database in Oracle There are three major groups of files on disk that devolve a database.
The most important of these are the database folders where the actual data insides. The control files and the redo logs support the properties of the architecture itself. All three groups of files must be open, present, and available to Oracle for any data on the database to be utilized. Without these files, you cannot operate the database, and the database administrator has to answer some or the entire database needs a backup, if there is one.
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
Explain the terms primary key, candidate key, alternate key and secondary key. In the given table identify every key? STUDENT(SID,Regno, Name, City) Primary Key: The prim
joins
What is a candidate key? Minimal super keys are known as candidate keys.
The H. I. Topi School of Business operates international business programs in 10 locations throughout Europe. The school had its first class of graduates in 1965. The school keep
Let us now make the E-R diagram for the student database as per the explanation given in the previous section. We can also states the overall logical structure of a database usi
limitations and benefits in database tecknowlagy
Two-way Associations Mostly, associations are travel in both directions, although not usually with same frequency. There are three approaches for the implementation. In
What are the drawbacks of File Oriented System in details?
Explain sorted File with advantages? Sorted file The sort utility shall perform one of the subsequent functions: 1.Sort lines of all the named files together and write the
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