MySQL
keyboard_arrow_down 295 guides
chevron_leftStatements and Clauses
check_circle
Mark as learned thumb_up
0
thumb_down
0
chat_bubble_outline
0
Comment auto_stories Bi-column layout
settings
MySQL | SELECT DISTINCT
schedule Aug 10, 2023
Last updated local_offer
Tags MySQL
tocTable of Contents
expand_more Master the mathematics behind data science with 100+ top-tier guides
Start your free 7-days trial now!
Start your free 7-days trial now!
The SELECT DISTINCT statement returns values that are distinct.
Syntax
SELECT DISTINCT column_nameFROM table_name;
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 find the distinct ages of students:
SELECT DISTINCT age FROM students;
+------+| age |+------+| 17 || 19 || 18 || 16 |+------+
Note that 17 is only returned once despite 'Sky' and 'Benjamin' both being 17 years old.
If we had not specified for DISTINCT age, we would return 5 records:
SELECT age FROM students;
+------+| age |+------+| 17 || 19 || 18 || 16 || 17 |+------+
Note that in this case 17 is returned twice as we have two students who are 17 years old.
Published by Arthur Yanagisawa
Edited by 0 others
Did you find this page useful?
thumb_up
thumb_down
Comment
Citation
Ask a question or leave a feedback...
thumb_up
0
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!
