mysql - List ocurrences in column - SQL -


i have table column has integers, example:

2 2 1 2 3 1 3

how values occur in column? in case results should be:

1 2 3

i know there's postgre called width_bucket couldn't make work me , i'm not sure if supposed solve problem.

thank in advance.

based upon question, simple select distinct , order by

select distinct(column_name) table_name order column_name desc

or 

select distinct(column_name) table_name order column_name

depending on sort order want


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