REGEXP_REPLACE

Replaces occurrences in the string expr that match the regular expression specified by the pattern pat with the replacement string repl, and returns the resulting string. If expr, pat, or repl is NULL, the return value is NULL.

Syntax

REGEXP_REPLACE(<expr>, <pat>, <repl[, pos[, occurrence[, match_type]]]>)

Arguments

Arguments	Description
expr	The string expr that to be matched
pat	The regular expression
repl	The replacement string
pos	Optional. The position in expr at which to start the search. If omitted, the default is 1.
occurrence	Optional. Which occurrence of a match to replace. If omitted, the default is 0 (which means "replace all occurrences").
match_type	Optional. A string that specifies how to perform matching. The meaning is as described for REGEXP_LIKE().

Return Type

VARCHAR

Examples

SELECT REGEXP_REPLACE('a b c', 'b', 'X');
+-----------------------------------+
| REGEXP_REPLACE('a b c', 'b', 'X') |
+-----------------------------------+
| a X c                             |
+-----------------------------------+

SELECT REGEXP_REPLACE('abc def ghi', '[a-z]+', 'X', 1, 3);
+----------------------------------------------------+
| REGEXP_REPLACE('abc def ghi', '[a-z]+', 'X', 1, 3) |
+----------------------------------------------------+
| abc def X                                          |
+----------------------------------------------------+

SELECT REGEXP_REPLACE('周 周周 周周周', '周+', 'X', 3, 2);
+-----------------------------------------------------------+
| REGEXP_REPLACE('周 周周 周周周', '周+', 'X', 3, 2)        |
+-----------------------------------------------------------+
| 周 周周 X                                                 |
+-----------------------------------------------------------+