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Flag Counter
  2. World Encyclopedia
  3. Range query (database) - Wikipedia
Range query (database) - Wikipedia
From Wikipedia, the free encyclopedia
For the problem in computer science, see Range query (computer science).

A range query is a common database operation that retrieves all records where some value is between an upper and lower boundary.[1] For example, list all employees with 3 to 5 years' experience. Range queries are unusual because it is not generally known in advance how many entries a range query will return, or if it will return any at all. Many other queries, such as the top ten most senior employees, or the newest employee, can be done more efficiently because there is an upper bound to the number of results they will return. A query that returns exactly one result is sometimes called a singleton.

Partial match query

Match at least one of the requested keys.

See also

References

  1. ^ "SQL BETWEEN Operator". W3Schools. Retrieved 4 November 2014.


Stub icon

This database-related article is a stub. You can help Wikipedia by adding missing information.

Sunting pranala
url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url 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