Data Analysis and Data Modeling in Visio

Lab entropy Analysis and Data Modeling in Visio Overview In this lab, we go forth learn to draw with Microsoft Visio the ERDs we created in class. Learning Objectives Upon completion of this learning unit you should be able to ? Understand the concept of selective information mannequin ? Develop business rules ? Develop and hold back good selective information naming conventions ? Construct simple data models using Entity Relationship Diagrams (ERDs) ? Develop entity relationships and define various types of attributes Lab Goals Our lab goals ar to 1. Learn to skeleton abstract models in Microsoft Visio. 2. Create the 5 ERDs from class in Microsoft Visio.You will accomplish this by order of payment the 4 diagrams from the class exercise. You will have to hand in all(a) 4 diagrams by FTPing them to your government note space on the IST-S-STUDENTS server and then pasting the url to the diagram in the text boxes for this weeks learning unit assessment. What you will need to b egin 1. A copy of Microsoft Visio 2003 (or higher) 2. The Visio Conceptual Modeling print conceptual modeling. vss (should be with the raw(a)(prenominal) cross- deposits from this weeks lesson) 3. The class exercises from this week (should also be with the other files from weeks lesson. ) Part 1 Getting Ready for Using Microsoft Visio for Conceptual ModelingOverview This constituent will explain how to use Microsoft Visio to create conceptual Entity-Relationship data models. Microsoft Visio has built-in database tools for creating logical data models (those that apply the relational database theory to your entity-relationship diagrams), and not very good at conceptual modeling. As a result, using the MS Visio database tools to create the conceptual model diagrams can sometimes feel similar trying to host a bit peg into a square hole. Since not many people are into shoving round pegs into square holes, this guide will explain how you can maximize the Visio database tools for creating conceptual models.For those of you familiar with Visio, here are the heuristics we will follow to make Visio conceptual model friendly intention Database Model Diagrams Modify the settings to be more user-friendly Do not use the relationship tool use my stencil or else Step 1 Create New Document The first step is to create a new document. From the Visio Menu, choose File ( New ( Software & Database ( Database Model Diagram pic This will create your blank Visio pageboy, and institutionalize the default database toolset. IMPORTANT The default Visio stencils are for logical modeling.Ive created a custom stencil for conceptual modeling. Step 2 Load the Conceptual Modeling Custom Stencil Download the stencil file from our learning management system and bear the conceptual modeling. vss somewhere on the local computer. From the Shapes Bar, select Shapes ( more Shapes ( Open Stencil Use the Open Stencil dialogue to browse for the conceptual modeling. vss and open it. Yo u should meet the following pic Step 3 Configure Default Settings This is the most important step. In this step we will tweak the database document settings so that they are favorable to conceptual modeling.The benefits of doing this are there will be very little reworking of the document at the logical modeling step. From the Visio Ribbon, choose Database ( Display Options The Database Document Options dialog will appear. From this dialog, select Relational symbol set, and Conceptual Names visible on the diagram, as displayed in this dialog pic Next, Click on the Table tab From this section of the dialog, display everything except annotations and vertical banknotes, do not show data types, and place primary keys at top, as displayed in the following dialog pic When youre finished click ok.This will close the Database Document Options dialog. NOTE You might want to save your document at this time. straightway that youve got things set-up this file can serve as a template for in store(predicate) conceptual modeling diagrams. AS A MATTER OF FACT, YOU CAN DOWNLOAD A PRE-BUILT VISIO TEMPLATE FROM THE categorise WEBSITE WITH THIS WEEKS MATERIALS. Part 2 Microsoft Visio for Conceptual Modeling Walk-Thru Overview In this section, we will walk-through creating a conceptual data model with Microsoft Visio. We will use the vBay (E-bay like website case study as an congressman for conceptual modeling. ) To Create an EntityDrag the pic icon onto the page and drop. Name the entity in the database properties window pic YOU DO IT Now add these 4 Entities to your diagram pic To Add Attributes to the entity To add attributes to your entity, simply click on the columns section of the database properties window, and unload in your column names. Be sure to include the appropriate attribute descriptors rucdm with the physical name. Ignore the data type Reqd and PK columns. Those are used in logical modeling. pic YOU DO IT Now add attributes to all 4 entities, like this pic To Add Relationships among the entitiesTo Add Relationships, simply drag the appropriate relationship cardinality (for example pic) onto the page and connect the ends to each entity. To snap the line to the entity drag the line end onto the box until it turns red, like this. bolshie symbolizes the shapes are glued together pic After to glue both ends of the line to an entity, you can double-click on the line to assign it a label. For example pic YOU DO IT Now add all the relationships to complete the conceptual model, like this pic Note You might have to juggle the shapes and lines around to achieve a best fit. It takes time and a whole lot of patienceOther Tips You can place multiple diagrams in one file Just keep adding pages. To add a page, from the menu select Insert ( Blank Page pic To call a page, right-click on the page and choose Rename You can add text to your diagram Use the Text tool in the ribbon. Home ( Text. When youre finished, be sure to select the Pointer rotati ng shaft again. pic Part 3 Creating the 4 diagrams from class exercise & handing it in. Take the 4 diagrams from class and draw them in Microsoft Visio. Place one diagram on each page. Label the pages accordingly Save the document transfer the document to blackboard