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Define Outer join
Outer join - If there are any type of values in the one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected. Such types of rows can be forcefully selected by using the outer join, The corresponding columns for that row will comprise NULLs. In fact there are three forms of the outer-join operation: left outer join (_X), right outer join (X_) and full outer join (_X_).
Name the three major set of files on disk that compose a database in Oracle. There are three main sets of files on disk that compose a database. All the files are binary. These
A View may be defined of as a virtual table, that is, a table that does not really exist in its own right but is instead inferred from one or more underlying base data table. T
Give an example of multiple inheritance. One example of multiple inheritance is a committee for students affair which include faculty and administrative staff member.
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Describe the development process of Object oriented methods Object oriented methods have roots which are strongly anchored back in the 60s, functional and structured methods we
What is average response time? The average response time is that the average time for a transaction to be done after it has been submitted.
2NF Normal Form : A relation schema process R is in 2NF if it is in 1NF and each non-prime attribute A in R is fully functionally related on primary key. Second normal form (2N
E-R model uses this symbol to represent weak entity set ? A Doubly outlined rectangle symbol is used to represent weak entity set.
how does Btree differ from a B+ - tree?
What are the advantages and disadvantages of merging an association into a class? Advantages: i) Less number of tables ii) Faster performance due to the fewer tables
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