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How to Filter Query Results in SQL

Many times you will want to filter results for very specific terms. You can accomplish this by using having and group by operators.
http://www.sqltutorials.net/comparison/filter-data-using-the-having-clause.html

Description:

The reason for having a database is to have vast amounts of data organized and readily available. SQL is the means by which we can communicate with the database and tell it to find exactly what we need.

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