将数据库脚本纳入版本管理是很必要的,尤其对于需要在客户那里部署升级的系统. 对于Python Django等框架,由于数据库是通过Model生成的,因此框架本身包括数据库升级工具,并通过代码版本间接管理了数据库脚本.对于直接通过数据库脚本来维护数据库schema和数据的框架,或者使用DbMaintain / Liquibase工具,它们提供了一些工具来跟踪当前数据库的版本并可以自动升级.回退.比较数据库等.(DbMaintain使用SQL,相比之下更自然一些,建议使用.) DbMaintainh…

我们都知道数据在存储引擎中是以页的形式组织的,但数据页在不同的组织形式中其中对应的数据行存储是不尽相同的,这里通过实例为大家介绍下堆表的中特有的一种情形Forwared Records及处理方式. 概念 堆表中,当对其中的记录进行更新时,如果当前数据页无法满足更新行的容量,此时这行记录将会转移到新的数据页中,而原数据页中将会留下指针(文件号,页号,槽号)链接到新的数据页中. Code 创建测试数据 create database testpage go use testpage go creat…

转载请注明出自天外归云的博客园:http://www.cnblogs.com/LanTianYou/ 对于SharePoint中已经是Record的Item,我们想要修改他的属性,这在UI界面是无法完成的: 这时需要通过Records.BypassLocks API来完成.设计一个tool,利用Records.BypassLocks API来修改Recorded Items的属性(这里拿Title举例),界面如下: 代码如下: using System; using System.Collect…

Suppose you want to check the user permissions on inserting or updating the records in Oracle Forms, then you can use Pre-Insert and Pre-Update triggers for that particular data block to check whether user is having proper permission or not.   The ex…

Download Source Code Providing an example form for creating hierarchical trees in Oracle Forms to control data block records. In this form whenever user selects any node in tree menu then corresponding record is displayed at right side.   This form i…

可用的查询设置如下: 参数 描述 举例 conditions Search conditions for the find operation. Is used to extract only those records that fulfill a specified criterion. By default Phalcon\Mvc\Model assumes the first parameter are the conditions. “conditions” => “name LIKE…

As we all know, PeopleSoft is capable of maintaining application data in multiple languages within the same database. This feature is driven by special records called Related Language Records that store language sensitive information in all required…

Shipping Transactions > Action: Launch Pick Release (B: Go) Error: The action can not be performed because the selected records could not be locked. --Ship (Confirm / Pick Release) errors with 'The action cannot be performed because the selected reco…

MySQL 中查找反复数据,删除反复数据 创建表和測试数据 /* 表结构 */ DROPTABLEIFEXISTS `t1`; CREATETABLEIFNOTEXISTS `t1`( `id` INT(1)NOTNULL AUTO_INCREMENT, `name` VARCHAR(20)NOTNULL, `add`VARCHAR(20)NOTNULL, PRIMARYKEY(`id`) )Engine=InnoDB; /* 插入測试数据 */ INSERTINTO `t1`(`name`,`…

[elk@zjtest7-frontend config]$ cat stdin04.conf input { stdin { } } filter { # drop sleep events grok { match => { "message" => "SELECT aaa" } add_tag => [ "sleep_aaa" ] #tag_on_failure => [] # prevent default _gr…