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MySQL | IN

schedule Aug 10, 2023
Last updated
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MySQL
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MySQL's IN operator allows you to combine multiple OR conditions elegantly. If a value is equal to any of the values provided in the IN list it returns 1 (true), otherwise it returns 0 (false).

Syntax

SELECT value IN (value1, value2, value3, ...);

SELECT column_name
FROM table_name
WHERE column_name IN (value1, value2, ...);

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 check whether 4 is one of the listed winning numbers:

SELECT 4 IN (0, 6, 10, 14);
+---------------------+
| 4 IN (0, 6, 10, 14) |
+---------------------+
| 0 |
+---------------------+

Unfortunately 4 is not one of the winning numbers 0, 6, 10 or 14.

To retrieve students who are either 16, 17 or 18 years old:

SELECT *
FROM students
WHERE age
IN (16, 17, 18);
+------------+----------+--------+--------------+------+----------+
| student_id | fname | lname | day_enrolled | age | username |
+------------+----------+--------+--------------+------+----------+
| 1 | Sky | Towner | 2015-12-03 | 17 | stowner1 |
| 3 | Travis | Apple | 2018-08-14 | 18 | tapple3 |
| 4 | Arthur | David | 2016-04-01 | 16 | adavid4 |
| 5 | Benjamin | Town | 2014-01-01 | 17 | btown5 |
+------------+----------+--------+--------------+------+----------+

All students except for Ben Davis who is 19 are returned.

robocat
Published by Arthur Yanagisawa
Edited by 0 others
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