Get column name length distribution in MariaDB database

The query below returns the distribution of the column name lengths (number of characters) for all databases (schemas).


select char_length(col.column_name) as column_name_length,
    count(*) as columns,
    count(distinct tab.table_name) as tables
from information_schema.tables as tab
    inner join information_schema.columns as col
        on tab.table_schema = col.table_schema
            and tab.table_name = col.table_name
where tab.table_type = 'BASE TABLE'
    -- and tab.table_schema = 'your database name'
group by char_length(col.column_name)
order by char_length(col.column_name);

Note: if you need the information for a specific database (schema), then uncomment the table_schema line and provide your database name.


  • column_name_length - length in column name characters
  • columns - number of columns with this length
  • tables - number of tables that have columns with this name length


  • One row: represents one name length (number of characters)
  • Scope of rows: each column length that exists in a database (schema)
  • Ordered by: ascending length (from 1 to max)

Sample results

If you put this information in a chart, it will look like this:

Comments are only visible when the visitor has consented to statistics cookies. To see and add comments please accept statistics cookies.
There are no comments. Click here to write the first comment.