Query syntax error help

[John Lester]

I'm attempting to copy the subscribethread table to a new table called unsub_subscribethread. Once the table is created I need to copy the data from subscribethread to unsub_subscribethread. I'm still a novice with sql but what I have looks right to me, but both queries give a syntax error

$db->query_write("CREATE TABLE IF NOT EXISTS " . TABLE_PREFIX . "unsub_subscribethread LIKE subscribethread");

$db->query_write("INSERT " . " unsub_sunscribethread SELECT * FROM subscribethread ");