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explain five responsibilities of DBA?
i need to implememnt a treee based mining algorithm. do you have an expert that can do that?
Define single valued and multivalued attributes. Single valued attributes: attributes with a single value for a particular entity are known as single valued attributes. M
External failure : A failure can also result because of an external cause, such as earthquakes, fire, floods, etc. The database must be duly backed up to avoid troubles occurring d
Which database level is closest to the users? External database level is closest to the users.
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
Define query language? A query is a statement requesting the retrieval of information. The portion of DML that includes information retrieval is known as a query language.
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
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