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December 16th, 2014 • By Brian Rue
RQL now includes a basic library of string functions. You can use these to slice and group your data in arbitrary ways. For example, "email domains with the most events in the past hour":
SELECT substring(person.email, locate('@', person.email)), count(*) FROM item_occurrence WHERE timestamp >= unix_timestamp() - 3600 AND person.email IS NOT NULL GROUP BY 1 ORDER BY 2 DESC
The new functions: concat, concatws, lower, upper, left, right, substring, locate, length, charlength. The functions are implemented to be compatible with MySQL; see the RQL docs for details.