如何从另一个表设置AUTO_INCREMENT [英] How to set AUTO_INCREMENT from another table

问题描述

如何在另一个表的CREATE TABLE或ALTER TABLE上设置AUTO_INCREMENT?

How can I set the AUTO_INCREMENT on CREATE TABLE or ALTER TABLE from another table?

我找到了这个问题，但没有解决我的问题: 如何重置MySQL自动增量使用另一个表中的MAX值?

I found this question, but not solved my issue: How to Reset an MySQL AutoIncrement using a MAX value from another table?

我也尝试过:

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');

此:

ALTER TABLE `table_name` AUTO_INCREMENT=(SELECT `AUTO_INCREMENT` FROM  `INFORMATION_SCHEMA`.`TABLES` WHERE `TABLE_SCHEMA` = 'database_name' AND `TABLE_NAME` = 'another_table_name');

此:

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`);

和这个:

ALTER TABLE `table_name` AUTO_INCREMENT=(SELECT (MAX(`id`)+1) FROM `another_table_name`);

推荐答案

此代码将为您创建过程:

This code will create procedure for you:

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);并将参数传递到方括号内.

Then you may call CALL tbl_wth_ai(2); passing the parameter inside the brackets.

例如:

CALL tbl_wth_ai((SELECT id FROM `ttest` WHERE c1='b'));

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