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MySQL | REPLACE method

schedule Aug 11, 2023
Last updated
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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.

NOTE

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.

robocat
Published by Arthur Yanagisawa
Edited by 0 others
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