SQL window function

In the SQL database query language, window functions allow access to data in the records right before and after the current record. ^[1]

3 relations: Database, Query language, SQL.

Database

A database is an organized collection of data, stored and accessed electronically.

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Query language

Query languages or data query languages (DQLs) are computer languages used to make queries in databases and information systems.

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SQL (S-Q-L, "sequel"; Structured Query Language) is a domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).

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References

[1] https://en.wikipedia.org/wiki/SQL_window_function

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