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Entity-relationship diagrams (ERDs) are used to visualize data and relationships among the entities of a system. At its core, an ER Diagram explains the logical structure and the flow of information within a data model.

Below are some important points to draw ER diagram: First, identify all the Entities. ... Identify relationships between entities and connect them using a diamond in the middle, illustrating the relationship. ... Connect attributes for entities and label them properly. Eradicate any redundant entities or relationships.

Below points show how to go about creating an ER diagram. Identify all the entities in the system. An entity should appear only once in a particular diagram. ... Identify relationships between entities. Connect them using a line and add a diamond in the middle describing the relationship. Add attributes for entities.

You read the diagrams first from left to right and then from right to left. In the case of the name-address relationship in following figure, you read the relationships as follows: names can be associated with zero or exactly one address; addresses can be associated with zero, one, or many names.

Go to the File menu, find Database, choose an ER diagram type and start. The ER diagram symbols library will open automatically on the left, providing a defined set of symbols commonly used in ER diagram. Drag a suitable shape for each entity or primary business concept relevant to your model.

Best Free ER Diagram Tools Visual Paradigm. Draw.io. Lucidchart. SqlDBM. DBDiagram.io. QuickDBD. Creately. ERDPlus.

ER diagrams or ERD's are composed of three main elements: entities, attributes, and relationships.

Below points show how to go about creating an ER diagram. Identify all the entities in the system. An entity should appear only once in a particular diagram. ... Identify relationships between entities. Connect them using a line and add a diamond in the middle describing the relationship. Add attributes for entities.

Steps to Make an Interactive Chart in Excel Prepare Data. First of all, copy this table and paste it below the original table.Insert Option Buttons. Go to developer tab ? Control ? Insert ? Option button.Insert Secondary Axis Chart. First of all, select your table and insert a column chart.

To create an interactive chart with a drop-down list, do the following: Add additional data to your spreadsheet for drop-down list values:Create data ranges, which will be used for the interactive chart:Create a chart that includes all data series: Change the data series:Add the drop-down list to the chart: