如何在另一个表的CREATE TABLE
或ALTER TABLE
上设置AUTO_INCREMENT
?
我发现了这个问题,但没有解决我的问题: How to Reset an MySQL AutoIncrement using a MAX value from another table?
我也试过这个:
CREATE TABLE IF NOT EXISTS `table_name` (
`id` mediumint(6) unsigned NOT NULL AUTO_INCREMENT,
`columnOne` tinyint(1) NOT NULL,
`columnTwo` int(12) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=(SELECT `AUTO_INCREMENT` FROM `INFORMATION_SCHEMA`.`TABLES` WHERE `TABLE_SCHEMA` = 'database_name' AND `TABLE_NAME` = 'another_table_name');
这个:
ALTER TABLE `table_name` AUTO_INCREMENT=(SELECT `AUTO_INCREMENT` FROM `INFORMATION_SCHEMA`.`TABLES` WHERE `TABLE_SCHEMA` = 'database_name' AND `TABLE_NAME` = 'another_table_name');
这个:
CREATE TABLE IF NOT EXISTS `table_name` (
`id` mediumint(6) unsigned NOT NULL AUTO_INCREMENT,
`columnOne` tinyint(1) NOT NULL,
`columnTwo` int(12) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=(SELECT (MAX(`id`)+1) FROM `another_table_name`);
还有这个:
ALTER TABLE `table_name` AUTO_INCREMENT=(SELECT (MAX(`id`)+1) FROM `another_table_name`);
最佳答案
此代码将为您创建过程:
CREATE PROCEDURE `tbl_wth_ai`(IN `ai_to_start` INT)
BEGIN
SET @s=CONCAT('CREATE TABLE IF NOT EXISTS `table_name` (
`id` mediumint(6) unsigned NOT NULL AUTO_INCREMENT,
`columnOne` tinyint(1) NOT NULL,
`columnTwo` int(12) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT = ', `ai_to_start`);
PREPARE stmt FROM @s;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END;
然后您可以调用 CALL tbl_wth_ai(2);
并在括号内传递参数。
例如:
CALL tbl_wth_ai((SELECT id FROM `ttest` WHERE c1='b'));
关于mysql - 如何从另一个表设置 AUTO_INCREMENT,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32550239/