In what conditions should indexes are employed
Under what conditions should indexes are employed?
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Indexes can be created to enforce exceptionality, to facilitate sorting, and to enable fast retrieval by column values. An excellent candidate for an index is a column which is frequently employed with equal conditions in WHERE clauses.
Write a short on the differences of the two principal types of packaged data models.
Illustrates storing of data in stored procedures increase the access time?
State the use of data stage jobs?
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