Bracketed Classes : Bracketed Special Classes « Regular Expressions Functions « Oracle PL/SQL Tutorial

Oracle PL/SQL Tutorial
1. Introduction
2. Query Select
3. Set
4. Insert Update Delete
5. Sequences
6. Table
7. Table Joins
8. View
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10. SQL Data Types
11. Character String Functions
12. Aggregate Functions
13. Date Timestamp Functions
14. Numerical Math Functions
15. Conversion Functions
16. Analytical Functions
17. Miscellaneous Functions
18. Regular Expressions Functions
19. Statistical Functions
20. Linear Regression Functions
21. PL SQL Data Types
22. PL SQL Statements
23. PL SQL Operators
24. PL SQL Programming
25. Cursor
26. Collections
27. Function Procedure Packages
28. Trigger
29. SQL PLUS Session Environment
30. System Tables Data Dictionary
31. System Packages
32. Object Oriented
33. XML
34. Large Objects
35. Transaction
36. User Privilege
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Oracle PL/SQL Tutorial » Regular Expressions Functions » Bracketed Special Classes 
18. 8. 1. Bracketed Classes
  1. [:digit:] matches all numbers.
  2. [:alnum:] matches all numbers and letters (alphanumerics).
  3. [:alpha:] matches characters only.
  4. [:lower:] matches lowercase characters.
  5. [:upper:] matches uppercase characters.
  6. [:space:] matches spaces.
  7. [:punct:] matches punctuation.
  8. [:print:] matches printable characters.
  9. [:cntrl:] matches control characters.
18. 8. Bracketed Special Classes
18. 8. 1. Bracketed Classes
18. 8. 2. [:digit:] matches all numbers.
18. 8. 3. The bracketed expression [[:digit]] matches numbers
18. 8. 4. REGEXP_INSTR(value,'[[:digit:]]')
18. 8. 5. Matching for a non-digit
18. 8. 6. [:alnum:] matches all numbers and letters (alphanumerics).
18. 8. 7. [:alpha:] matches characters only.
18. 8. 8. [:lower:] matches lowercase characters.
18. 8. 9. [:upper:] matches uppercase characters.
18. 8. 10. [:space:] matches spaces.
18. 8. 11. [:punct:] matches punctuation.
18. 8. 12. [:print:] matches printable characters.
18. 8. 13. [:cntrl:] matches control characters.
18. 8. 14. REGEXP_INSTR(value,'[[:lower:]]')
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