SQL Challenges-1: Unique values

Last update on December 20 2024 11:58:41 (UTC/GMT +8 hours)

From the following table, write a SQL query to find the unique marks. Return the unique marks.

Input:

Table: student_test

Structure:

Field	Type	Null	Key	Default	Extra
student_id	int(11)	YES
marks_achieved	int(11)	YES

Data:

student_id	marks_achieved
1	56
2	74
3	15
4	74
5	89
6	56
7	93

Sample Solution:

SQL Code(MySQL):

DROP TABLE IF EXISTS student_test;
CREATE TABLE student_test(student_id int,  marks_achieved int);
INSERT INTO student_test VALUES (1, 56);
INSERT INTO student_test VALUES (2, 74);
INSERT INTO student_test VALUES (3, 15);
INSERT INTO student_test VALUES (4, 74);
INSERT INTO student_test VALUES (5, 89);
INSERT INTO student_test VALUES (6, 56);
INSERT INTO student_test VALUES (7, 93);
SELECT * FROM student_test;
SELECT DISTINCT(marks_achieved) AS  'Unique Marks' FROM student_test;

Sample Output:

Unique Marks|
------------|
          56|
          74|
          15|
          89|
          93|

SQL Code Editor:

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