从MySQL到Oracle(NOW()和autoincrement ID)
我真的不知道该怎么问,但是。。。代码将帮助我:从MySQL到Oracle(NOW()和autoincrement ID),mysql,oracle,timestamp,auto-increment,Mysql,Oracle,Timestamp,Auto Increment,我真的不知道该怎么问,但是。。。代码将帮助我: /** * Languages table definition */ DROP TABLE IF EXISTS `languages`; CREATE TABLE `languages` ( -- Common: `id` INTEGER NOT NULL AUTO_INCREMENT COMMENT 'Unique registry identifier', `creat
/**
* Languages table definition
*/
DROP TABLE IF EXISTS `languages`;
CREATE TABLE `languages`
(
-- Common:
`id` INTEGER NOT NULL AUTO_INCREMENT COMMENT 'Unique registry identifier',
`created` TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT 'Registry creation TIMESTAMP',
`updated` TIMESTAMP NOT NULL DEFAULT NOW() ON UPDATE NOW() COMMENT 'Registry last update TIMESTAMP',
`active` BOOLEAN NOT NULL DEFAULT TRUE COMMENT 'Virtual deletion flag',
PRIMARY KEY (`id`),
-- /Common
`language_id` INTEGER(2) UNSIGNED NOT NULL COMMENT 'Language identifier',
`language_code` VARCHAR(2) NOT NULL COMMENT 'ISO 639-1 Code',
`language_name` VARCHAR(20) NOT NULL COMMENT 'Language name',
-- Indexes
UNIQUE KEY `language_id` (`language_id`)
) ENGINE=InnoDB CHARACTER SET 'latin1' COLLATE 'latin1_general_ci';
/**
* Updates multilang field to UTF-8
*/
ALTER TABLE `languages` MODIFY `language_name` VARCHAR(20) CHARACTER SET 'utf8' COLLATE 'utf8_general_ci';
/**
* Assigns the current TIMESTAMP to the created field without user input
*/
CREATE TRIGGER `insert_languages` BEFORE INSERT ON `languages`
FOR EACH ROW
SET NEW.created = NOW();
/* Insert a record */
INSERT INTO languages(language_id, language_code, language_name) VALUES(10, 'es', 'Español');
/* Update that record (after a few seconds) */
UPDATE languages SET language_name = 'Español (España)' WHERE language_id = 10;
检索*时,如果language_id=10
,则会收到两个不同的时间戳,而不会显式地触及时间戳
字段,插入时也不需要包含id。问题是:如何在Oracle中创建相同的行为
一起使用
触发器,以获得自动增量idsysdate
或systimestamp
或localdate
来维护日期。。。而不是触发器中的NOW()
,BEFORE INSERT
和BEFORE UPDATE
下面是一个自动递增序列/触发器示例-@Phil非常感谢,这对我帮助很大。虫族我需要把所有的东西都放在一个触发器里,对吗?我指的是日期和顺序。@Edgar:随你的便。这两种解决方案(1个或多个触发器)都将起作用same@zerkms谢谢,我给人的印象是“触发器最多,速度最慢”。MySql 5.2:NOW()在触发器中对我有效,因为我不使用BEGIN。。。结束。