mysql mergeテーブルの作成クエリーの便利さ
8061 ワード
SELECT COUNT(*) FROM `comment`
SHOW CREATE TABLE `comment`
CREATE TABLE `comment1` (
`id` INT(8) NOT NULL AUTO_INCREMENT,
`blogUser` VARCHAR(20) NOT NULL,
`replayUser` VARCHAR(20) NOT NULL,
`articleId` INT(8) NOT NULL DEFAULT '0',
`content` TEXT,
`addTime` DATETIME NOT NULL,
PRIMARY KEY (`id`),
KEY `addTime` (`addTime`),
KEY `replayUser` (`replayUser`)
) ENGINE=MYISAM AUTO_INCREMENT=1000004 DEFAULT CHARSET=utf8
INSERT INTO comment1 SELECT `id` ,
`blogUser`,
`replayUser`,
`articleId` ,
`content` ,
`addTime`
FROM `comment` LIMIT 0,500003
CREATE TABLE `comment2` (
`id` INT(8) NOT NULL AUTO_INCREMENT,
`blogUser` VARCHAR(20) NOT NULL,
`replayUser` VARCHAR(20) NOT NULL,
`articleId` INT(8) NOT NULL DEFAULT '0',
`content` TEXT,
`addTime` DATETIME NOT NULL,
PRIMARY KEY (`id`),
KEY `addTime` (`addTime`),
KEY `replayUser` (`replayUser`)
) ENGINE=MYISAM AUTO_INCREMENT=1 DEFAULT CHARSET=utf8
INSERT INTO comment1 SELECT `id` ,
`blogUser`,
`replayUser`,
`articleId` ,
`content` ,
`addTime`
FROM `comment` LIMIT 500003,60000000
CREATE TABLE `allcomment` (
`id` INT(8) NOT NULL AUTO_INCREMENT,
`blogUser` VARCHAR(20) NOT NULL,
`replayUser` VARCHAR(20) NOT NULL,
`articleId` INT(8) NOT NULL DEFAULT '0',
`content` TEXT,
`addTime` DATETIME NOT NULL,
PRIMARY KEY (`id`),
KEY `addTime` (`addTime`),
KEY `replayUser` (`replayUser`)
) ENGINE=MERGE UNION (comment1, comment2) INSERT_METHOD=LAST AUTO_INCREMENT=1 ;
SELECT COUNT(*) FROM `allcomment`