Oracle analysis function ntile

The Oracle analysis function ntile has such A requirement that the scores of the course are divided into four levels, to provide A, B, C, and D Performance for students. Droptablecoursepurge; create

The Oracle analysis function ntile has such A requirement that the scores of the course are divided into four levels, to provide A, B, C, and D Performance for students. Drop table course purge; create

Oracle analysis function ntile

With such A requirement, the scores of the course are divided into four levels to provide A, B, C, and D Performance for students.

Drop table course purge;
Create table course
(
Id number,
Grade number
);
Insert into course values (1, 50 );
Insert into course values (2, 55 );
Insert into course values (3,60 );
Insert into course values (4,65 );
Insert into course values (5, 70 );
Insert into course values (6, 75 );
Insert into course values (7,80 );
Insert into course values (8, 85 );
Insert into course values (9, 90 );
Insert into course values (10, 95 );
Commit;

SQL> select id, grade, ntile (4) over (order by grade desc) til from course;
ID GRADE TIL
------------------------------
10 95 1
9 90 1
8 85 1
7 80 2
6 75 2
5 70 2
4 65 3
3 60 3
2 55 4
1 50 4
10 rows have been selected.

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