FxGqlC is an open source command line tool used to analyze text files with a language that is very similar to SQL (Structured Query Language). FxGqlC runs on any operating system that supports the .net Framework, such as Microsoft Windows (using Microsoft .net) or Linux/MacOS (using Mono). It runs on 64-bit where available. The GQL language of FxGqlC is based on T-SQL, the SQL variant used in Microsoft SQL Server. FxGqlC was originally developed for extracting useful information from huge log files in a very fast way.