Visio relationship arrow to connect 2 tables in Database ER diagrams - Stack Overflow
Using Visio to create ER Diagrams Drag the entity icon to the drawing Drag relationship ICON to Parent entity (entity border turns red) and then drag to . Crow's Foot Notation is used in ERD (Entity Relationship Diagram), You can use Microsoft Visio ,, , , to draw ER. in Visio. They're one-dimensional shapes that are used most frequently to connect Connectors are fundamental to many types of Visio diagrams. The connectors there make the relationships between people clear.
One-dimensional shapes will display endpoints, whereas two-dimensional shapes will display a selection frame with green sizing and rotation handles. Because they're shapes themselves, connectors also have properties you can use to customize them. So far, you've seen only line connectors, but there are other types as well, such as arrows. Connectors are fundamental to many types of Visio diagrams. You might not need them in, say, office layouts, but you do when you're creating an organization chart.
Or a software flowchart. Or an electrical circuit. For example, take a look at Figure 3. The connectors there make the relationships between people clear. There are all kinds of ways of connecting shapes in Visio, such as these: Select the Connector tool in the toolbar—This tool is in the Standard toolbar.
Drag a connector from the Shapes window to the drawing surface—Many types of connectors appear in stencils. Click the Connect Shapes button in the toolbar—This tool is in the Action toolbar. Use automatic connection points—They're those light-blue triangles that appear around shapes.
In Visio, connectors are not just simple lines. You can have dynamic connectors, which will reconnect themselves to other connection points as you move a shape in order to not make the drawing look tortuous. And there are smart connectors that change their shape or form to avoid other shapes as you adjust your drawing.
You're going to see this kind of behavior in this chapter. There are many different ways of adding connectors to a drawing.
Using Visio for ERD design
For example, you can use automatic connections. To do that, make sure that the AutoConnect tool has been selected it appears in the toolbar with a border around it. The AutoConnect tool appears in Figure 3. When you use AutoConnect, Visio connects shapes for you.
Define a relationship in a Database Model diagram
You can use it with the two shapes shown in Figure 3. Roll the mouse over one of those automatic connection points, and it will darken to dark blue—and a neighboring shape will get a red rectangle around it, indicating that it's the target of the automatic connector. You can see this at work in Figure 3. If you click the darkened automatic connector, the connector will be drawn between the shapes, as shown in Figure 3.
Creating Connection Points That's fine as far as it goes, but sometimes shapes don't have connection points where you want them. Click Yes to remove the relationship from both the drawing and the underlying model. Click No to remove only the line on the drawing. If you click No and later decide to add the line back into the drawing, select one of the tables in the relationship and, on the Database menu, click Show Related Tables.
You can choose to always or never drop deleted relationships from the underlying model. On the Database menu, point to Options, click Modeling, and go to the Logical diagram tab.
Define a relationship as one-to-one or as one-to-many The cardinality of a relationship describes how many rows in one table can relate to how many rows in another table. For example, one department can have many employees, but an employee can belong to only one department.
Display primary : foreign key relationships in Visio database diagram - Stack Overflow
Cardinality is usually expressed as one-to-one, one-to-many, and many-to-many. In the Database Properties window, under Categories, click Miscellaneous. Under Cardinality choose the cardinality that fits the relationship best. For one-to-many relationships that would be either Zero or more or One or more.Many to Many Relationships in Visio 2010 Demo
For one-to-one relationships that would be either Zero or one or Exactly one. Show relationships and their properties in a diagram You can choose to show or hide information about relationships in your diagram.
On the Database menu, point to Options, and then click Document.
On the Relationships tab, check information you want to show on the diagram. You can show or hide Relationships.