How to find row size of table

Question

Hi,
How can I find row size of a table ?
In My table has millinon's of data inserted.
thanks in advance.

Answer 1

Here is a PL/SQL procedure to calculate average row length. It works, but it has an issue because you cannot use VSIZE on BLOB data columns, and it could be re-done using dbms_lob.getlength(BLOB_COLUMN) to get an accurate average_row_length for rows with a BLOB column..
To find the actual size of a row I did this:
/* TABLE */
select
3 + avg(nvl(dbms_lob.getlength(CASE_DATA),0)+1 +
nvl(vsize(CASE_NUMBER ),0)+1 +
nvl(vsize(CASE_DATA_NAME),0)+1 +
nvl(vsize(LASTMOD_TIME_T),0)+1
) "Total bytes per row"
from
arch_case_data
where
case_number = 301;
Total bytes per row
3424
/* INDEX */
select sum(COLUMN_LENGTH)
from dba_ind_columns
where TABLE_NAME = 'ARCH_CASE_DATA';
SUM(COLUMN_LENGTH)
22
So, the total bytes used is 3424+22.