数据库设计文档DBMS的快速转换
校讯通数据库从sybase系统改造到oracle系统，进行了对象的总计有312张实体表，20个过程，通过手工敲，那肯定是猴年马月的事情，不
今天PMO下达任务单，校讯通数据库从sybase系统改造到Oracle系统，进行了对象的总计有312张实体表，20个过程，通过手工敲，那肯定是猴年马月的事情，不符合项目任务的工期进度。以下是本次转化的快捷方法：
1、通过powerdesigner的Change Current DBMS操作。
new dbms 选择ORACLE Version 10gR2替换current dbms的Sybase AS Enterprise 12.5.3a。
符合期望的：通过此步操作char、varchar、numeric、datetime转向了我们期望的char、varchar2、number、date。
不符合期望的：integer没有转向我们期望的number，默认值getdate()没有转向我们期望的SYSDATE，default ''没有转为有效的default ' '。针对oracle 空串是无效的。索引名保留了sybase特性，对象中唯一，却没有符合oracle的全局唯一。过程那是原原本本保留了sybase的脚本。
2、开始针对不符合期望的改造工作
校讯通数据库设计文档是用powerdesigner15版本设计的，可以直接通过编辑工具editplus，UltraEdit打开，本质上是xml文件，然后查找integer类型定义关键字串。
类型定义：
针对本质是布尔类型，是和否的判断的，显然NUMBER(1)就行，在定义此类字段名时有显著特征is_开头，通过EltraEdit打开找到is_字符串，在此字符串附近定位到针对这个字段的类型定义，由于做了前面步骤，都已经改成了NUMBER(10)统一改为NUMBER(1)，针对其他字段，虽然可能有的字段长度不需要10，个别对待修改。
默认值定义：
做了以上两步之后，表对象定义的类型以及默认值都符合了期望，至于索引名称由于要全局唯一，只能通过手工修改了，包括过程也是。通过统一替换已经给我们节省了不少时间，赶上项目任务单的计划进度不成问题了。其他类型的数据库设计文档的DBMS转换可以参考类似。
修改的规范参见：数据库设计规范
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How does Go language implement the addition, deletion, modification and query operations of the database?
Mar 27, 2024 pm 09:39 PM
Go language is an efficient, concise and easy-to-learn programming language. It is favored by developers because of its advantages in concurrent programming and network programming. In actual development, database operations are an indispensable part. This article will introduce how to use Go language to implement database addition, deletion, modification and query operations. In Go language, we usually use third-party libraries to operate databases, such as commonly used sql packages, gorm, etc. Here we take the sql package as an example to introduce how to implement the addition, deletion, modification and query operations of the database. Assume we are using a MySQL database.
iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos
Jul 18, 2024 am 05:48 AM
Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps
How does Hibernate implement polymorphic mapping?
Apr 17, 2024 pm 12:09 PM
Hibernate polymorphic mapping can map inherited classes to the database and provides the following mapping types: joined-subclass: Create a separate table for the subclass, including all columns of the parent class. table-per-class: Create a separate table for subclasses, containing only subclass-specific columns. union-subclass: similar to joined-subclass, but the parent class table unions all subclass columns.
Detailed tutorial on establishing a database connection using MySQLi in PHP
Jun 04, 2024 pm 01:42 PM
How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())
How to handle database connection errors in PHP
Jun 05, 2024 pm 02:16 PM
To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.
An in-depth analysis of how HTML reads the database
Apr 09, 2024 pm 12:36 PM
HTML cannot read the database directly, but it can be achieved through JavaScript and AJAX. The steps include establishing a database connection, sending a query, processing the response, and updating the page. This article provides a practical example of using JavaScript, AJAX and PHP to read data from a MySQL database, showing how to dynamically display query results in an HTML page. This example uses XMLHttpRequest to establish a database connection, send a query and process the response, thereby filling data into page elements and realizing the function of HTML reading the database.
Tips and practices for handling Chinese garbled characters in databases with PHP
Mar 27, 2024 pm 05:21 PM
PHP is a back-end programming language widely used in website development. It has powerful database operation functions and is often used to interact with databases such as MySQL. However, due to the complexity of Chinese character encoding, problems often arise when dealing with Chinese garbled characters in the database. This article will introduce the skills and practices of PHP in handling Chinese garbled characters in databases, including common causes of garbled characters, solutions and specific code examples. Common reasons for garbled characters are incorrect database character set settings: the correct character set needs to be selected when creating the database, such as utf8 or u
How to connect to remote database using Golang?
Jun 01, 2024 pm 08:31 PM
Through the Go standard library database/sql package, you can connect to remote databases such as MySQL, PostgreSQL or SQLite: create a connection string containing database connection information. Use the sql.Open() function to open a database connection. Perform database operations such as SQL queries and insert operations. Use defer to close the database connection to release resources.
