What is ORDER BY FIELD in mysql?

see you have a table name employee like below

table name employee

id   name      grade
1    Mahesh   A
2    Vikrant    B
3    Vikas       C
4    Pankaj     D

if you want to fetch these record in a specific order like D, B, C, A


then, you have to use ORDER BY FIELD clause in mysql.
 
 e.g.,

SELECT * FROM employee
ORDER BY FIELD(grade, 'D', 'B', 'C', 'A');

now the output of above query will be:


id   name      grade
4    Pankaj     D2    Vikrant    B
3    Vikas       C
1    Mahesh   A