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One doc tagged with "Sum"

Sum in a database system refers to a mathematical operation that calculates the total value of a specific field or attribute in a set of data. Sum is often used in database queries to obtain summaries or statistics about the data in the database.

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Lucene Index Queries

The basic search engine in the HgDB database is the Apache Lucene index implementation. Lucene Core is a Java library that provides advanced indexing and search features, as well as spell checking, hit highlighting, and advanced analysis capabilities. This article will describe the rules for creating search and aggregate queries that apply in Mercury DB (HgDb) 3.0.