This query lets you find out most popular column names.

Query

select c.colname as column_name,
count(*) as tables
from syscat.columns c
inner join syscat.tables t on 
      t.tabschema = c.tabschema and t.tabname = c.tabname
where t.type = 'T'
group by  c.colname
having count(*) > 1
order by count(*) desc;

Columns

• column_name - column name
• tables - number of tables that have particular column name

Rows

• One row represents particular column name (each name appears only once)
• Scope of rows: all colum names that appear at least twice (in two tables)
• Ordered by the most popular first

Sample results