php - Retrieve table values without retrieving duplicate values -

my table this:

 class 5 5 6 6 6 7 8 8 8 9 10 

is possible retrieve class values 5,6,7,8,9,10 without retrieving duplicate class values?

you can use distinct achieve it.

syntax:

select distinct column_name table_name; 

based on above syntax, query should be

select distinct class 'table_name'