diff --git a/db/update.sql b/db/update.sql
new file mode 100644
index 0000000000..d7e71ef2e7
--- /dev/null
+++ b/db/update.sql
@@ -0,0 +1,119 @@
+# story优先级的默认值。
+ALTER TABLE `zt_story` CHANGE `pri` `pri` TINYINT( 3 ) UNSIGNED NOT NULL DEFAULT '3'
+
+# 修改project code字段的长度。
+ALTER TABLE `zt_project` CHANGE `code` `code` VARCHAR( 20 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL 
+
+# task 暂时增加left字段：
+ ALTER TABLE `zt_task` ADD `left` tinyINT(3) NOT NULL AFTER `consumed`
+
+# 修改日期字段
+ALTER TABLE `zt_bug` CHANGE `openedDate` `openedDate` DATETIME NOT NULL ,
+CHANGE `assignedDate` `assignedDate` DATETIME NOT NULL ,
+CHANGE `resolvedDate` `resolvedDate` DATETIME NOT NULL ,
+CHANGE `closedDate` `closedDate` DATETIME NOT NULL ,
+CHANGE `lastEditedDate` `lastEditedDate` DATETIME NOT NULL 
+
+RENAME TABLE `zentao`.`zt_division` TO `zentao`.`zt_dept` ;
+ALTER TABLE `zt_user` CHANGE `division` `dept` MEDIUMINT( 8 ) UNSIGNED NOT NULL DEFAULT '0'
+
+
+0.2版本：
+
+修改task表name字段的长度。
+修改task表的时间的类型，可以是浮点数。
+ALTER TABLE `zt_task` CHANGE `estimate` `estimate` FLOAT UNSIGNED NOT NULL ,
+CHANGE `consumed` `consumed` FLOAT UNSIGNED NOT NULL ,
+CHANGE `left` `left` FLOAT UNSIGNED NOT NULL
+
+todo表
+
+CREATE TABLE IF NOT EXISTS `zt_todo` (
+  `id` mediumint(8) unsigned NOT NULL auto_increment,
+  `account` char(30) NOT NULL,
+  `date` date NOT NULL default '0000-00-00',
+  `begin` smallint(4) unsigned zerofill NOT NULL,
+  `end` smallint(4) unsigned zerofill NOT NULL,
+  `type` char(10) NOT NULL,
+  `idvalue` mediumint(8) unsigned NOT NULL default '0',
+  `pri` tinyint(3) unsigned NOT NULL,
+  `name` char(90) NOT NULL,
+  `desc` char(255) NOT NULL default '',
+  `status` enum('wait','doing','done') NOT NULL default 'wait',
+  PRIMARY KEY  (`id`),
+  KEY `user` (`account`)
+) ENGINE=MyISAM  DEFAULT CHARSET=utf8;
+
+更新product, project表中的company字段：
+update zt_product set company = 1;
+update zt_project set company = 1;
+
+更新story字段里面的estimate字段：
+ALTER TABLE `zt_story` CHANGE `estimate` `estimate` FLOAT UNSIGNED NOT NULL
+
+还是使用datetime字段。
+ALTER TABLE `zt_story` CHANGE `openedDate` `openedDate` DATETIME NOT NULL ,
+CHANGE `assignedDate` `assignedDate` DATETIME NOT NULL ,
+CHANGE `lastEditedDate` `lastEditedDate` DATETIME NOT NULL ,
+CHANGE `closedDate` `closedDate` DATETIME NOT NULL
+
+# 增加diff字段。 
+ALTER TABLE `zt_history` ADD `diff` TEXT NOT NULL 
+
+10.27
+ALTER TABLE `zt_todo` CHANGE `desc` `desc` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL
+ALTER TABLE `zt_task` CHANGE `name` `name` VARCHAR( 90 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL
+
+ALTER TABLE `zt_task` CHANGE `estimate` `estimate` FLOAT UNSIGNED NOT NULL ,
+CHANGE `consumed` `consumed` FLOAT UNSIGNED NOT NULL ,
+CHANGE `left` `left` FLOAT UNSIGNED NOT NULL 
+
+
+11.2
+todo表增加private字段：
+ALTER TABLE `zt_todo` ADD `private` BOOL NOT NULL
+
+11.4
+增加消耗表。
+CREATE TABLE IF NOT EXISTS `zt_burn` (
+  `project` mediumint(8) unsigned NOT NULL,
+  `date` date NOT NULL,
+  `left` float NOT NULL,
+  `consumed` float NOT NULL,
+  PRIMARY KEY  (`project`,`date`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1;
+
+11.5 project status字段更改。
+ALTER TABLE `zt_project` CHANGE `status` `status` VARCHAR( 10 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL
+
+11.10.
+
+ALTER TABLE `zt_bug` CHANGE `openedDate` `openedDate` DATETIME NOT NULL ,
+CHANGE `assignedDate` `assignedDate` DATETIME NOT NULL ,
+CHANGE `resolvedDate` `resolvedDate` DATETIME NOT NULL ,
+CHANGE `closedDate` `closedDate` DATETIME NOT NULL ,
+CHANGE `lastEditedDate` `lastEditedDate` DATETIME NOT NULL
+
+11.12 
+
+ALTER TABLE `zt_bug` ADD `duplicateBug` MEDIUMINT UNSIGNED NOT NULL AFTER `closedDate` ,
+ADD `linkBug` VARCHAR( 255 ) NOT NULL AFTER `duplicateBug` ,
+ADD `case` MEDIUMINT UNSIGNED NOT NULL AFTER `linkBug` ,
+ADD `result` MEDIUMINT UNSIGNED NOT NULL AFTER `case`
+
+11.13
+ALTER TABLE `zt_case` CHANGE `openedDate` `openedDate` DATETIME NOT NULL ,
+CHANGE `lastEditedDate` `lastEditedDate` DATETIME NOT NULL
+
+11.16
+ALTER TABLE `zt_file` CHANGE `addedDate` `addedDate` DATETIME NOT NULL;
+ALTER TABLE `zt_file` ADD `title` CHAR( 90 ) NOT NULL AFTER `file`;
+ALTER TABLE `zt_file` ADD `objectType` CHAR( 10 ) NOT NULL AFTER `size` ,
+ADD `objectID` MEDIUMINT NOT NULL AFTER `objectType` ;
+
+ALTER TABLE `zt_file` CHANGE `file` `pathname` CHAR( 50 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL;
+ALTER TABLE `zt_file` CHANGE `type` `extension` CHAR( 30 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL;
+
+ALTER TABLE `zt_task` CHANGE `status` `status` ENUM( 'wait', 'doing', 'done', 'cancel' ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT 'wait'
+
+ALTER TABLE `zt_todo` CHANGE `name` `name` CHAR( 150 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL