VQL

VQL is an acronym used in several software domains to denote query languages. There is no single standardized language called VQL, and the exact syntax and semantics depend on the project. In practice, VQL can refer to more than one distinct tool or specification that shares the same abbreviation.

Vector Query Language refers to a class of query languages designed for vector databases and similarity search in machine learning contexts. It emphasizes operations on high-dimensional vectors, including similarity metrics, distance computations, and nearest-neighbor retrieval. Typical features include projection of fields, filtering, and ranking results by vector similarity, often with support for K-nearest neighbors and index-based acceleration. Implementations vary in syntax and integration with storage backends.

Visual Query Language describes a family of UI-driven query languages used in data visualization and business intelligence tools. Rather than writing code, users build queries through graphical elements such as fields, filters, and joins. VQL-based tools aim to simplify data exploration, but can differ in expressiveness and performance, sometimes requiring translation to a backend query language such as SQL.

Overall, VQL serves as an umbrella term for multiple, unrelated query-language projects. When encountering the acronym, it is important to consult project documentation to determine which variant is being referenced and what features are supported.