How to set Drupal 6.x site offline using SQL

This is how to set Drupal 6.x site offline using SQL

UPDATE variable SET value='s:1:"1";' WHERE name = 'site_offline';
DELETE FROM cache WHERE CID = 'variables';

This is how to put it online again

UPDATE variable SET value='s:1:"0";' WHERE name = 'site_offline';
DELETE FROM cache WHERE CID = 'variables';
Knowledge keywords: 
SQL
Drupal 6.x