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ISO/IEC 19075-5:2021
Information technology - Guidance for the use of database language SQL - Part 5: Row pattern recognition
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| Označení normy: | ISO/IEC 19075-5:2021 |
| Vydáno: | 2021-09-01 |
| Edice: | 1 |
| ICS: | 35.060 |
Popis
ISO/IEC 19075-5:2021
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.