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qlc stands for Query List Comprehension used in Query Interface to Mnesia, ETS, Dets table by using qlc we can join multiple table and fetch data .
Erlang in general is used to program highly distributed and fault tolerant systems. Even though it has its roots in the telecommunication industry, it has proven useful in several other sites like ejabbered, Facebook chat etc.
Erlang was developed at Ericsson and was designed from the ground up for writing scalable, fault-tolerant, distributed, non-stop, soft-realtime applications.
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