Reverse engineer or design a database with Microsoft Visio

Microsoft Visio Reverse Engineering Database Diagram
Microsoft Visio Database Reverse Engineering
Microsoft Visio Database Reverse Engineer Job
Microsoft Visio Database Reverse Engineer

Sometimes we need to reverse engineer our database. Microsoft Visio has an option for reverse engineering. But by default it does not support MySQL or in other words you cannot reverse engineer a MySQL database. I have faced this problem and got the solution and sharing here with you.

The steps involved in this process are described below:

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Download the latest MySQL ODBC connector from MySQL site. You may find it here http://dev.mysql.com/downloads/connector/odbc/5.1.html.
After downloading install the connector.
Now open Microsoft Visio and open Database Model Diagram template (you may find it under Software and Database group).
From Database menu click on Reverse Engineer. You will see the Reverse Engineer wizard.
Click on the New button.
Select System Data Source.
Click Next.
Select MySQL ODBC driver from the list.
Click Next and then Finish. MySQL Connector/ODBC Data Source Configuration window will open.
Give a name to the datasouce, database server host, user name, password and select the database you want to reverse engineer. Remember, the list of database will be shown if you have provided correct information.
Click on Ok. Now you will find the data source in Data Source list.
Select the newly created data source and click Next. The regular wizard for reverse engineering will start.

The Database Reverse Engineering using MS Visio is a feature that enables maintain your documentation always updated, without need to collect this information by an SQL Server expert user. This helps to save development time, in different task analysis between everyone involved in the use of the data and It's database structure. How to Reverse Engineer in Microsoft Visio Go to File - New - Database - Database Model Diagram. On the menu bar, choose Database - Reverse Engineer. A Reverse Engineer Wizard will appear. Select the Microsoft Visio database driver for your database management system (DBMS). If you have not already associated the Visio database driver with a particular ODBC data source, click Setup to do so now. If you are reverse engineering an Excel worksheet, choose the ODBC Generic Driver.

Reverse engineer or design a database with Microsoft Visio - Atlanta .NET Regular Guys

Reverse engineer or design a database with Microsoft Visio

How to use Microsoft Visio for Enterprise Architects SP-2 to reverse engineer your database to get nice drawings, and how to turn nice drawings into actual database objects.
Part 1: Reverse Engineer your database
First up you simply open Visio and create a new Database Model Diagram
This gives you a database menu option in the menu bar with several helpful commands. There are other database modeling types like ER diagrams and ORM diagrams, but those don’t allow you to make changes to your diagram and update the database or generate new databases later. Now that you have your new, blank document we can use the Reverse Engineer Wizard to connect to a database and generate our drawing automatically. On the menu bar, select Database…Reverse Engineer to launch the wizard. The first step in the Reverse Engineer Wizard is to use your ODBC data sources to find the database. If you don’t already have an ODBC connection for your database, you can create a new one inside of the wizard. Use the screenshots at the bottom of this article to guide you through creating a new User Data Source for use with Visio.
Once you have selected your database connection object, pick which types to reverse engineer (tables, keys, indexes, etc) and then pick the objects you want to reverse engineer. You are first presented with a checkbox list of tables and views followed by a checkbox list of stored procedures. Finally you are given the option to allow the system to add the shapes to the page or to add the shapes manually. I recommend allowing the system to do the work. The last screen you are presented is basically a review of your selections. Click Finish to have the system design the drawing. The resulting drawing will have all the primary keys, foreign keys, relationships, etc. When you click on an object such as a a database table you’ll get the ability to look into the table’s design; column names, indexes, triggers, etc. Here is an example of just such a view.

Part 2: Generate a database from a drawing

Microsoft Visio Reverse Engineering Database Diagram

Now let’s take a look at things from the other side. In my particular case I felt that I needed to start from scratch to fully redesign my database, so I began with a blank Database Model Diagram and built up each table individually. To design a new table, drag an Entity object from the Shapes toolbox onto the drawing page and modify its database properties as I have done in this screenshot. To create a relationship between two tables, drag a relationship object from the Shapes toolbox onto the drawing page. Drag the arrow end onto the parent table and the other end onto the other table.
Visio will attempt to automatically identify the relationship between your tables based on the conceptual names of your tables’ fields. This example shows just such a relationship
I worked on my table and relationship details until I had this design. I was able to normalize the data, reuse some existing tables, and basically reform the data architecture underneath this application to something that seemed to be a lot more reasonable. Now, with this kind of a table layout, I’m properly positioned to use custom business objects or an OR Mapper like the one from Paul Wilson. The old architecture made that choice difficult if not impossible.

Microsoft Visio Database Reverse Engineering

Now that I have my nice new database object design, I want to create these tables. Actually, what I really want is the DDL script I can edit and use in any database to generate these tables. In my case, some of the tables represented in my drawing pre-exist and don’t need to be changed in any way. To do this, I go back to the handy Database menu and select Generate from the list. The first thing that will happen is that the model will be checked for any errors and warnings – things like similar field names with different data types or mismatched relationships. If I have any errors I must fix them first, much like in Visual Studio. Microsoft Visio Database Reverse Engineer

Once I pass the error checking, I am presented with the Generate Wizard – . The Generate wizard allows me to chose a file location for a DDL script or I can actually have Visio connect to the database engine for me and create a brand new database. Chose to generate the script and click next to get to the database specification portion. Here you can pick which type of database rules you’re going to follow, SQL Server, Access, Oracle, DB2, etc. Pick SQL Server, give your database a name for use in the script and click Next.<