Comments on: How to determine row count for all tables in an Oracle Schema?

By: vehshi

vehshi — Tue, 08 Sep 2009 18:25:00 +0000

Then where does count(*) on a table gets it data from?

By: JonWat

JonWat — Wed, 06 May 2009 14:15:19 +0000

Because the information in user tables is as of the last time you gathered statistics on the tables: it is not a count of the current # of rows. If you haven;t analysed the tables, those columns will be blank.

By: matthew kerle

matthew kerle — Tue, 06 Jan 2009 07:05:00 +0000

why not just query num_rows directly from the user_tables table?

select table_name, num_rows, blocks from user_tables order by num_rows desc;

much easier one query not n + 1.

By: Sam

Sam — Tue, 23 Dec 2008 19:31:18 +0000

Thanks for the script, I did a few more updates on this:
-> Added the owner name
-> getting table list from all_tables, excluding system, sys
-> seperating the table name and count by a comma to be able to open in an excel as a csv file

Set heading off
Set feedback off
Set pagesize 0
Set termout off
Set trimout on
Set trimspool on
Set recsep off
Set linesize 1000
Column d noprint new_value date_
Column u noprint new_value user_
Spool c:\temp\tmp
Select ‘Select ”’||owner||’.'||table_name||’ , ”||count(*) from ‘||owner||’.'||table_name ||’;',
to_char(sysdate, ‘YYYYMMDDHH24MISS’) d, user u
from all_tables
where owner not in (‘SYS’, ‘SYSTEM’)
order by table_name
/
Spool off

By: Sathish

Sathish — Mon, 24 Nov 2008 04:58:02 +0000

This query is good. I was searching in the net among them this is straight forward query.