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| 18. 2. REGEXP_INSTR | | 18. 2. 1. | Regexp_Instr returns the location (beginning) of a pattern in a given string | | | | 18. 2. 2. | REGEXP_INSTR(x, pattern [, start [, occurrence [, return_option [, match_option]]]]) searches for pattern in x. | | | | 18. 2. 3. | Regexp_Instr | | | | 18. 2. 4. | Parameters is a field that may be used to define how one wants the search to proceed: | | | | 18. 2. 5. | Find the 's' and ignore case. | | | | 18. 2. 6. | The simplest regular expression matches letters, letter for letter | | | | 18. 2. 7. | SELECT REGEXP_INSTR('Two is bigger than One','One') where_it_is | | | | 18. 2. 8. | Occurrence refers to the first, second, third, etc., occurrence of the pattern in S. The default is 1 (first). | | | | 18. 2. 9. | Return-option returns the position of the start or end of the matched string. | | | | 18. 2. 10. | The Return-option is set to 1 to indicate the end of the found pattern | | | | 18. 2. 11. | Returns the position of the second occurrence that matches the regular expression s[[:alpha:]]{3} starting at position 1: | | | | 18. 2. 12. | Returns the position of the second occurrence that matches the letter o starting at position 10 using REGEXP_INSTR() | | | | 18. 2. 13. | Specify any series of letters and find matches, just like INSTR | | | | 18. 2. 14. | regexp_instr(comments, '[^ ]+', 1, 9) > 0 | | |
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