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Concatenating multiple rows into one field in MySQL
schedule Aug 12, 2023
Last updated local_offer
Tags MySQL
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We can concatenate multiple results into one field in MySQL using the GROUP_CONCAT(~) method.
Example
Consider the following table about whether students hold a drivers license:
student_id | full_name | age | has_license |
|---|---|---|---|
1 | Sky Towner | 17 | 0 |
2 | Ben Davis | 19 | 1 |
3 | Travis Apple | 18 | 0 |
4 | Arthur David | 16 | 0 |
5 | Benjamin Town | 17 | 1 |
The above sample table can be created using the code here.
To concatenate the full_name of all students and return in a single row:
SELECT GROUP_CONCAT(full_name)FROM drivers_license;
+--------------------------------------------------------------+| GROUP_CONCAT(full_name) |+--------------------------------------------------------------+| Sky Towner,Ben Davis,Travis Apple,Arthur David,Benjamin Town |+--------------------------------------------------------------+
For comparison, if we had not used GROUP_CONCAT(~) the result would look like below:
SELECT full_name FROM drivers_license;
+---------------+| full_name |+---------------+| Sky Towner || Ben Davis || Travis Apple || Arthur David || Benjamin Town |+---------------+
Published by Arthur Yanagisawa
Edited by 0 others
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