CREATE TABLE IF NOT EXISTS `stats` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `type` varchar(16) NOT NULL,
  `word` varchar(256) NOT NULL,
  `time` int(16) NOT NULL,
  `tweetId` varchar(24) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `id` (`id`),
)

id 	select_type 	table 	type 	possible_keys 	key 	key_len 	ref 	rows 	Extra
1 	SIMPLE 	tweet 	index 	NULL 	PRIMARY 	26 	NULL 	2351 	Using index
1 	SIMPLE 	stats 	ALL 	NULL 	NULL 	NULL 	NULL 	6138 	Using where; Not exists