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What is transaction?
Transaction is a unit of program implementation that accesses and possibly updated several data items.
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
What is a state chart diagram? State diagrams (State Chart Diagram) explain all possible states that a particular object can get into, and how object's state changes as result
In object oriented design, which steps must designer take to adjust inheritance? To readjust inheritance following steps should be taken: i) Rearrange and adjust the classe
What is the archtetype/instance pattern? The archetype/instance pattern happens when one entity tracks occurrences of another entity. A common example is the relationship among
Eliminate Columns Not Dependent On Key The Employee Relation satisfies - First normal form - As it has no repeating groups. Second normal form - As it do not have multi-a
I need some help with my normalization database homework.
What is difference between primary index and secondary index? Primary Index a) It is an ordered file whose records are of fixed length along with two fields. b) Only base
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
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