gistfile1.sql

SELECT DISTINCT t1.sess
FROM (
wp_cf7groups AS t1
INNER JOIN wp_cf7dbplugin_submits AS t2 ON ( t1.cf1 = t2.submit_time
OR t1.cf2 = t2.submit_time )
)
WHERE t2.form_name
IN (
'Azienda1',  'Azienda2'
)
ORDER BY sess DESC 
LIMIT 49 , 1