Definition
QUEL was the query language used in the original Ingres system from Berkeley University.
Key Points
QUEL was one of the first relational database query languages. It can be seen as a syntactically sugared tuple relational calculus language. The Postgres extension of Ingres originally used an extention of QUEL called PostQUEL, but was later replaced with SQL.
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Risch, T. (2018). QUEL. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_1104
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DOI: https://doi.org/10.1007/978-1-4614-8265-9_1104
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Publisher Name: Springer, New York, NY
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