This document discusses the syntax and semantics for recognizing patterns in rows of a table, as defined in ISO\/IEC 9075-2, commonly called \u201cSQL\/RPR\u201d.<\/p>\n
SQL\/RPR defines two features regarding row pattern recognition:<\/p>\n
Feature R010, \u201cRow pattern recognition: FROM clause\u201d<\/p>\n<\/li>\n
Feature R020, \u201cRow pattern recognition: WINDOW clause\u201d<\/p>\n<\/li>\n<\/ul>\n
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.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Contents <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | Tables <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4 Row pattern recognition: FROM clause 4.1 Context of row pattern recognition 4.2 Introduction to the FROM clause in row pattern recognition 4.3 Example of ONE ROW PER MATCH <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4.4 Example of ALL ROWS PER MATCH <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 4.5 Summary of the syntax <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 4.6 The row pattern input table 4.6.1 Introduction to the row pattern input table <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 4.6.2 The row pattern input name <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 4.6.3 The row pattern input declared column list <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 4.7 MATCH_RECOGNIZE 4.8 PARTITION BY 4.9 ORDER BY 4.10 Row pattern variables <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 4.11 MEASURES <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 4.12 ONE ROW PER MATCH vs ALL ROWS PER MATCH 4.12.1 Introduction to use of ROWS PER MATCH 4.12.2 Handling empty matches <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 4.12.3 Handling unmatched rows <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 4.13 AFTER MATCH SKIP <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 4.14 PATTERN 4.14.1 Introduction to the PATTERN syntax <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 4.14.2 PERMUTE <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 4.14.3 Excluding portions of the pattern <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 4.15 SUBSET <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 4.16 DEFINE <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 4.17 The row pattern output table 4.17.1 Introduction to the row pattern output table <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 4.17.2 Row pattern output name 4.17.3 Row pattern output declared column list <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 4.18 Prohibited nesting 4.18.1 Introduction to prohibited nesting <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 4.18.2 Row pattern recognition nested within another row pattern recognition 4.18.3 Outer references within a row pattern recognition query <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 4.18.4 Conventional query nested within row pattern recognition query <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | 4.18.5 Recursion 4.18.6 Concatenated row pattern recognition <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | 5 Expressions in MEASURES and DEFINE 5.1 Introduction to the use of expressions in MEASURES and DEFINE 5.2 Row pattern column references <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | 5.3 Running vs. final semantics <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | 5.4 RUNNING vs.FINAL keywords <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | 5.5 Aggregates 5.6 Row pattern navigation operations 5.6.1 The four operations 5.6.2 PREV and NEXT <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | 5.6.3 FIRST and LAST <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | 5.6.4 Nesting FIRST and LAST within PREV or NEXT <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 5.7 Ordinary row pattern column references reconsidered <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | 5.8 MATCH_NUMBER function 5.9 CLASSIFIER function <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | 6 Row pattern recognition: WINDOW clause 6.1 Introduction to the WINDOW clause 6.2 Example of row pattern recognition in a window <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | 6.3 Summary of the syntax 6.3.1 Syntax components <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | 6.3.2 Syntactic comparison to windows without row pattern recognition <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | 6.3.3 Syntactic comparison to MATCH_RECOGNIZE 6.4 Row pattern input table 6.5 Row pattern variables and other range variables <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | 6.6 Windows defined on windows <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | 6.7 PARTITION BY 6.8 ORDER BY 6.9 MEASURES 6.10 Full window frame and reduced window frame 6.10.1 Introduction to window framing <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | 6.10.2 ROWS BETWEEN CURRENT ROW AND 6.10.3 EXCLUDE NO OTHERS 6.11 AFTER MATCH SKIP <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | 6.12 INITIAL vs SEEK 6.13 PATTERN 6.14 SUBSET 6.15 DEFINE 6.16 Empty matches and empty reduced window frames <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | 6.17 Prohibited nesting 6.17.1 Restrictions on nesting <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | 6.17.2 Row pattern recognition nested within another row pattern recognition 6.17.3 Outer references within a row pattern recognition query <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | 6.17.4 Conventional query nested within row pattern recognition query 6.17.5 Recursion 6.17.6 Concatenated row pattern recognition <\/td>\n<\/tr>\n | ||||||
| 75<\/td>\n | 7 Pattern matching rules 7.1 Regular expression engines <\/td>\n<\/tr>\n | ||||||
| 76<\/td>\n | 7.2 Parenthesized language and preferment 7.2.1 Introduction to parenthesized language and preferment <\/td>\n<\/tr>\n | ||||||
| 77<\/td>\n | 7.2.2 Alternation 7.2.3 Concatenation <\/td>\n<\/tr>\n | ||||||
| 78<\/td>\n | 7.2.4 Quantification <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | 7.2.5 Exclusion <\/td>\n<\/tr>\n | ||||||
| 80<\/td>\n | 7.2.6 Anchors 7.2.7 The empty pattern 7.2.8 Infinite repetitions of empty matches <\/td>\n<\/tr>\n | ||||||
| 82<\/td>\n | 7.3 Pattern matching in theory and practice <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Information technology. Guidance for the use of database language SQL – Row pattern recognition<\/b><\/p>\n |