Find table record length

[AIXDB2DBA]

The results in the following query do not reflect the same record length displayed in Control Center, Estimate Statistics panel in UDB AIX. Why? How could I build a query that generates record length for every table?

select tabname,sum(length)
from syscat.columns
where tabschema = '<schema-name>'
group by tabname

 

[Pikkunero]

This query you're using calculates only the length of the data in a table. The whole length is propably more since each column has to be separated somehow from each other.