MySQL的：創建枚舉

Question

的默認值表錯誤，當我在創建一個表phpMyAdmin的，我收到此錯誤：

#1067 - Invalid default value for 'htmlstate'

查詢創建表：

CREATE TABLE `cms_article` (
    `contentid` int(10) unsigned NOT NULL AUTO_INCREMENT, 
    `pagetext` mediumtext /*!40101 COLLATE latin1_bin */ NOT NULL, 
    `threadid` int(10) unsigned DEFAULT NULL, 
    `blogid` int(10) unsigned DEFAULT NULL, 
    `posttitle` varchar(255) /*!40101 COLLATE latin1_bin */ DEFAULT NULL, 
    `postauthor` varchar(100) /*!40101 COLLATE latin1_bin */ DEFAULT NULL, 
    `poststarter` int(10) unsigned DEFAULT NULL, 
    `blogpostid` int(10) unsigned DEFAULT NULL, 
    `postid` int(10) unsigned DEFAULT NULL, 
    `post_posted` int(10) unsigned DEFAULT NULL, 
    `post_started` int(10) unsigned DEFAULT NULL, 
    `previewtext` varchar(2048) /*!40101 COLLATE latin1_bin */ DEFAULT NULL, 
    `previewimage` varchar(256) /*!40101 COLLATE latin1_bin */ DEFAULT NULL, 
    `imagewidth` int(10) unsigned DEFAULT NULL, 
    `imageheight` int(10) unsigned DEFAULT NULL, 
    `previewvideo` mediumtext /*!40101 COLLATE latin1_bin */, 
    `htmlstate` enum('off','on','on_nl2br') /*!40101 COLLATE latin1_bin */ NOT NULL DEFAULT 'off', 
    PRIMARY KEY (`contentid`) 
) ENGINE=InnoDB AUTO_INCREMENT=503 /*!40101 DEFAULT CHARSET=latin1 */ /*!40101 COLLATE=latin1_bin */; 

Answer 1

在早期版本的MySQL，你可以只聲明它NOT NULL：

If an ENUM column is declared to permit NULL, the NULL value is a legal value for the column, and the default value is NULL. If an ENUM column is declared NOT NULL, its default value is the first element of the list of permitted values.

（從here。）

第一個值'off'將用於您的情況。