Entity – Relationship Model (E-R Model) - ppt video online download
Construct an E-R diagram for a car insurance company whose customers own one or more cars each. Each car has associated with it zero to any number of. Construct a clean and concise ER diagram for the NHL database. Answer: (a) Construct an E-R diagram for a car-insurance company whose. How can I create a very simple entity-relationship diagram of an insurance How do I create a simplified entity-relationship diagram for an insurance company? with lines, changing colors and fonts by using built-in auto-create tools etc.
Car Insurance Management System ER Diagram | FreeProjectz
Here, we don't want to keep the billing and vehicle information in the same table. Billing information should be kept in one table and vehicle should be kept in another table.
Whenever we design the database, we talk about the Normalization. It is the process of organizing the data to reduce the redundancy. Therefore, we will keep the Vehicle in Vehicle table and Billing information in Bill table.
Each record should have a unique identify column so we will create Primary Key column in every table. Here, we will make the Join between Policy and Bill table. So, we will create a different table to make our database as a Normalized database. Below is the list of tables: List of Tables Policy: This table keeps the information about the insured vehicle. There could more than one vehicle under a policy so all vehicles will go under this table.Steps to draw ER DIAGRAM in Database management system
There could be more than one driver under a policy. This table holds the driver's mailing and garage address, that's why there is One-To-Many relationship between Driver and DriverAddress table.
This table holds the Traffic Violation Code.
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We have zero to many instead of One-To-Many because some drivers have never violated the traffic rule. There could be more than one bill for a policy so we will have One-To-Many relationship between Policy and Bill table.
Customer could make multiple payment transactions or one.
Relationship sets that involve two entity sets are binary or degree two. Generally, most relationship sets in a database system are binary. Simple and composite attributes Single-valued and multi-valued attributes Example: Most useful in describing binary relationship sets. For a binary relationship set the mapping cardinality must be one of the following types: One to one One to many Many to one Many to many 11 Cardinality: Example One to one One to many Note: Some elements in A and B may not be mapped to any elements in the other set 12 Cardinality: Example Many to one Many to many Note: Some elements in A and B may not be mapped to any elements in the other set 13 Keys A super key of an entity set is a set of one or more attributes whose values uniquely determine each entity.
EXTENDED ER-DIAGRAM (Insurance Company) Roll No; 29 S5CS2 | LBS kuttipedia
Diamonds represent relationship sets. Lines link attributes to entity sets and entity sets to relationship sets. Ellipses represent attributes Double ellipses represent multivalued attributes.