is produces the same result as omitting DISTINCT.\n\nIf there are no matching rows, MIN() returns NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.7/en/group-by-functions.html\n\n','mysql> SELECT student_name, MIN(test_score), MAX(test_score)\n       FROM student\n       GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.7/en/group-by-functions.html');