DELETE from sessions WHERE expiredt<(UNIX_TIMESTAMP()-10800)
CHECK TABLE sessions FAST QUICK
SELECT * FROM sessions WHERE sid='a18uss8v9sjg27v81rb1ao14nc'
INSERT INTO sessions SET sid='a18uss8v9sjg27v81rb1ao14nc', dt_in=NOW(), ip='54.144.95.36', host='', session_lng='rus', expiredt=(unix_timestamp()+10800)
SELECT * FROM sessions WHERE sid='a18uss8v9sjg27v81rb1ao14nc'
update sessions set script_name='/printer.php' WHERE sid='a18uss8v9sjg27v81rb1ao14nc'
select cat_id from www_tree where main_page=1