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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_).
Concurrency issues Data integrity: Threads accessing same object need to be synchronized, such as: banking account. Deadlock: One or more threads in system are perman
Define Signal. It allows methods to respond to events triggered by themselves or by other processes. Each signal corresponds to an exacting event. A signal is represented in Sy
to develop elrctronic database from manual forms
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What is an ER diagram? Why is it used in Database management system (DBMS)?
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