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Use of QLC with Mnesia in Erlang programming.

Tarun Kumar 2968 15-Mar-2016
erlang erlang 
Updated on 22-Sep-2020
Tarun Kumar

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Tarun Kumar

Tarun Kumar

15-Mar-2016
QLC stands for 'Query List Comprehension' which is used with Mnesia database, to enhance the operational ability of Mnesia. QLC having our own documentation as a part of the OTP documentation set.
Main features of QLC with Mnesia are as follows:

QLC is used to optimize the query compiler for Mnesia Database. and for making Mnesia DBMS more efficient.
QLC is used like a database programming language for Mnesia and it includes a notation called "list comprehensions" and can be used to make complex database queries over a set of tables.

QLC Syntax: [Expression || Qualifier1, Qualifier2, ...]
Expression - it is an Erlang expression (template)
Qualifiers -  these are the filters (erlang expressions) or generators (List Expressions)
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