search
HomeDatabaseMysql Tutorial在EA中将画出的ER图转换成SQL脚本

在EA中将画出的ER图转换成SQL脚本

Jun 07, 2016 pm 03:56 PM
sqlReplace withdatabasehourScriptdesignconduct

在进行数据库设计的时候,想着正好安装着EA软件呢,看能不能用EA画ER模型。结果发现不仅能画,而且还能进行整套数据库设计(生成SQL脚本)。 下面以机房收费系统用户--学生为例。学生可以查看余额,可以查看上机记录,可以查看上机状态,可以查看充记录,可

在进行数据库设计的时候,想着正好安装着EA软件呢,看能不能用EA画ER模型。结果发现不仅能画,而且还能进行整套数据库设计(生成SQL脚本)。

下面以机房收费系统用户--学生为例。学生可以查看余额,可以查看上机记录,可以查看上机状态,可以查看充值记录,可以修改密码。步骤如下:

(1)建立ER图之前,首先在EA中应选择使用哪种数据库。如图所示:

\

\

(2)画学生用户的ER模型图,如图所示:

\

(3)转换成数据模型图,选中所有的实体和属性名,右击,点击转换出现如图:

\

(4)选择ERD to Data Modeling选项及保存的位置,点击开始转换,转换成如图所示:

\

(5)任何的数据库表都需要主键,外键和约束,下面我们对这些表进行修改,选择任何一个数据表右击出现如图:喎?http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+ICAgICAgIDxpbWcgc3JjPQ=="http://www.2cto.com/uploadfile/Collfiles/20140603/2014060310081251.png" alt="\">

(6)点击“属性”按钮,出现如图所示:

\

(7)点击“Table Detail”,选中“columns”,点击确定出现如图所示:

\

(8)按照步骤走,就对表设置完主键和数据类型了。另外我们还要对其添加外键,选中联系(如:

\右击,选择外键,对其就可以进行设置。这样修改基本就完成。

修改完的数据模型图如图所示:

\

(9)选中数据模型图,右击,选择“代码生成”--"Generate Selected Elements",出现如图所示:

\

(10)进行修改和对对象进行全选。在“文件生成”那,可以选择“单个文件”,也可以选择“每个表生成一个文件”。选择“每个表生产一个文件”,生成的形式如图:

\

选择“单个文件”,生成形式如下:

\

这样就已经创建成功啦!(SQL脚本就给大家展示了!)

直接看一下数据库中的表吧!如图:

当然这样建立的数据库,只是雏形,我们还要进行优化:消除重复和遵循三范式。

这应该说是懒人的办法直接生成SQL脚本,但是这个也是有难度的,因为我们必须对ER图相当了解和对各种表的关系进行非常透彻的分析,不然画出来的数据库还要进行相当大的修改。

在我们这个初学的阶段,我觉得还是用动手设计数据库比较好,练习一下对数据库的使用,只是最近碰见了一种这样的办法,先尝试了一下!

Ps:对这种办法只是实验了一下,还不成熟!请多多指教!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
What Are the Limitations of Using Views in MySQL?What Are the Limitations of Using Views in MySQL?May 14, 2025 am 12:10 AM

MySQLviewshavelimitations:1)Theydon'tsupportallSQLoperations,restrictingdatamanipulationthroughviewswithjoinsorsubqueries.2)Theycanimpactperformance,especiallywithcomplexqueriesorlargedatasets.3)Viewsdon'tstoredata,potentiallyleadingtooutdatedinforma

Securing Your MySQL Database: Adding Users and Granting PrivilegesSecuring Your MySQL Database: Adding Users and Granting PrivilegesMay 14, 2025 am 12:09 AM

ProperusermanagementinMySQLiscrucialforenhancingsecurityandensuringefficientdatabaseoperation.1)UseCREATEUSERtoaddusers,specifyingconnectionsourcewith@'localhost'or@'%'.2)GrantspecificprivilegeswithGRANT,usingleastprivilegeprincipletominimizerisks.3)

What Factors Influence the Number of Triggers I Can Use in MySQL?What Factors Influence the Number of Triggers I Can Use in MySQL?May 14, 2025 am 12:08 AM

MySQLdoesn'timposeahardlimitontriggers,butpracticalfactorsdeterminetheireffectiveuse:1)Serverconfigurationimpactstriggermanagement;2)Complextriggersincreasesystemload;3)Largertablesslowtriggerperformance;4)Highconcurrencycancausetriggercontention;5)M

MySQL: Is it safe to store BLOB?MySQL: Is it safe to store BLOB?May 14, 2025 am 12:07 AM

Yes,it'ssafetostoreBLOBdatainMySQL,butconsiderthesefactors:1)StorageSpace:BLOBscanconsumesignificantspace,potentiallyincreasingcostsandslowingperformance.2)Performance:LargerrowsizesduetoBLOBsmayslowdownqueries.3)BackupandRecovery:Theseprocessescanbe

MySQL: Adding a user through a PHP web interfaceMySQL: Adding a user through a PHP web interfaceMay 14, 2025 am 12:04 AM

Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

MySQL: BLOB and other no-sql storage, what are the differences?MySQL: BLOB and other no-sql storage, what are the differences?May 13, 2025 am 12:14 AM

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

MySQL Add User: Syntax, Options, and Security Best PracticesMySQL Add User: Syntax, Options, and Security Best PracticesMay 13, 2025 am 12:12 AM

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

MySQL: How to avoid String Data Types common mistakes?MySQL: How to avoid String Data Types common mistakes?May 13, 2025 am 12:09 AM

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools