Empty This chapter describes Mnemosyne, the Mnesia database query language, and the syntax, semantics, and rules which apply to Mnesia queries. The following sections are included: Mnemosyne - the Mnesia query language Evaluating queries Mnesia query examples Matching Generated functions The following notational conventions are used in this chapter: Reserved words and symbols are written like this: table . Syntactic categories are written like this: <pattern> . Empty Empty Mnemosyne is the query language and the optimizing query compiler for the Mnesia Database Management System. Empty Database queries are used when more complex operations than just a simple key-value lookup are required on a database. A query can find all records in a table that fulfills a given property. For example, think of a table storing the status of subscriber lines in a telephone exchan...