Hello guys,
Most of time we face the problem order by within IN() values . Mysql provides the function FIELD(), It will sort fetched IN() data according to requirment . The FIELD function returns the position of the first string in the remaining list of strings
For Example:-

|   id   |   name  |
^--------^---------^
|   5    |   B     |
|   6    |   B     |
|   1    |   D     |
|   15   |   E     |
|   17   |   E     |
|   9    |   C     |
|   18   |   C     |

If you fetch data without FIELD function , It may give result unordered according to within IN() values. If we use FIELD function as given below , It will gives sorted result.

SELECT id, name
FROM mytable
WHERE name IN ('B', 'A', 'D', 'E', 'C')
ORDER BY FIELD(name, 'B', 'A', 'D', 'E', 'C')