SELECT me.id, me.conversation, me.from_user, me.message, me.timestamp FROM message me  JOIN user from_user ON ( from_user.id = me.from_user ) WHERE ( from_user.im_network = ? ): 'Yahoo'

SELECT me.id, me.conversation, me.from_user, me.message, me.timestamp FROM message me  JOIN conversation conversation ON ( conversation.id = me.conversation ) LEFT JOIN conversation_user users ON ( users.conversation = conversation.id ) LEFT JOIN user user ON ( user.id = users.user ) WHERE ( user.im_username = ? ): 'linux_rohan'