BS ISO/IEC 19075-5:2021

This standard BS ISO/IEC 19075-5:2021 Information technology. Guidance for the use of database language SQL is classified in these ICS categories:

• 35.060 Languages used in information technology

This document discusses the syntax and semantics for recognizing patterns in rows of a table, as defined in ISO/IEC 9075-2, commonly called “SQL/RPR”.

SQL/RPR defines two features regarding row pattern recognition:

• Feature R010, “Row pattern recognition: FROM clause”

• Feature R020, “Row pattern recognition: WINDOW clause”

These two features have considerable syntax and semantics in common, the principle difference being whether the syntax is placed in the FROM clause or in the WINDOW clause.