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.QL (pronounced "dot-cue-el") is an object-oriented query language used to retrieve data from relational database management systems. It is reminiscent of the standard query language SQL and the object-oriented programming language Java. .QL is an object-oriented variant of a logical query language called Datalog. Hierarchical data can therefore be naturally queried in .QL in a recursive manner. Queries written in .QL are optimised, compiled into SQL and can then be executed on any major relational database management system. .QL query language is being used in SemmleCode to query a relational representation of Java programs. .QL is developed at Semmle Limited and is based on the company's proprietary technology. == Language Features == .QL has several language features to make queries concise, intuitive and reusable: * Extensible type hierarchy * Methods and predicates * Definition before use 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「.QL」の詳細全文を読む スポンサード リンク
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