How to build a query with the database if the key is the same and the values ​​are different?

Question

MySQL

There is a table like:
"key" => 1,
"key" => 2,
"key" => 3,
How do I select all the values? When I make a selection, my values ​​are overwritten and only the last one remains

Answer 1

SELECT * FROM `table` WHERE `key` IN (1,2,3)
or

SELECT * FROM `table` WHERE `key`='1' OR  `key`='2' OR `key`='3'