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WINDOW FUNCTIONS. Window functions compute their result based on a sliding window frame, a set of rows that are somehow related to the current row. AGGREGATE FUNCTIONS VS. WINDOW FUNCTIONS. Unlike aggregate functions, window functions do not collapse rows. current row.
SQL: The Complete Reference describes the SQL features and functions that are available in the most popular SQL-based DBMS products and those that are described in the ANSI/ISO SQL standards.
29 kwi 2020 · This 2-page SQL Window Functions Cheat Sheet covers the syntax of window functions and a list of window functions. Download it in PDF or PNG format.
Part 1 can be downloaded free of charge from ISO. ISO released a free technical report on “ SQL Support for Time-Related Information ” (covers temporal tables). Browsable BNF grammar of Part 2 and Part 4.
1 cze 2021 · Some databases implement non-standard solutions for concatenating strings like CONCAT() or CONCAT_WS(). Check the documentation for your specific database. Use the _ character to replace any single character. Use the % character to replace any number of characters (including 0 characters).
* Powerful, database-specific features such as SQL Server's PIVOT and UNPIVOT operators, Oracle's MODEL clause, and PostgreSQL's very useful GENERATE_SERIES function * Pivoting rows into columns, reverse-pivoting columns into rows, using pivoting to facilitate inter-row calculations, and double-pivoting a result set
22 lis 2024 · The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site.
