MySQL | REPLACE method
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MySQL's REPLACE(~) method returns the input string str with all occurrences of the from_str substring replaced by the new substring to_str.
The REPLACE(~) method is case-sensitive.
Parameters
1. str | string
The string for which we will replace occurrences of from_string.
2. from_str | string
The substring to be replaced.
3. to_str | string
The substring to insert in place of the from_str substring.
Return value
The input string str with all occurrences of the from_str substring replaced by the new substring to_str.
Examples
Consider the following table about some students:
student_id | fname | lname | day_enrolled | age | username |
|---|---|---|---|---|---|
1 | Sky | Towner | 2015-12-03 | 17 | stowner1 |
2 | Ben | Davis | 2016-04-20 | 19 | bdavis2 |
3 | Travis | Apple | 2018-08-14 | 18 | tapple3 |
4 | Arthur | David | 2016-04-01 | 16 | adavid4 |
5 | Benjamin | Town | 2014-01-01 | 17 | btown5 |
The above sample table can be created using the code here.
Basic usage
To replace all occurrences of 'Town' in student last names with 'T0WN':
SELECT lname, REPLACE(lname, 'Town', 'T0WN') AS 'Modified lname'FROM students;
+--------+----------------+| lname | Modified lname |+--------+----------------+| Towner | T0WNer || Davis | Davis || Apple | Apple || David | David || Town | T0WN |+--------+----------------+
The method is case-sensitive:
SELECT REPLACE('Someone say something!', 's', '$');
+---------------------------------------------+| REPLACE('Someone say something!', 's', '$') |+---------------------------------------------+| Someone $ay $omething! |+---------------------------------------------+
Note that all the lowercase 's' are replaced with '$' but the capital 'S' remains unchanged.
