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DBMS ER Model

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ER Diagram for Hotel Management System in DBMS

In DBMS, ER diagram for a hotel management system shows how the databases are connected to each other. It also shows how all the databases are logically related to each other. We can also create an ER diagram by drawing the figure of a different part of the hotel management system and their properties and how they perform their task. 

We can draw an ER diagram of the hotel management system by drawing the design of the database. The sketch of the database became the storage of the database where the data comes and goes. 

Details Hotel Management System ER Diagram

Now we describe the overall function of the Hotel Management System in the below table. It is a complete overview of the information about the hotel management project.

Name:ER Diagram of the Hotel Management System.  
Abstract:The ER Diagram of the Hotel management system shows the relationship between various entities. We can also call it the blueprint of the hotel management system.  
Diagram:We can also call the ER diagram an Entity Relationship diagram.  
Tool used:The ER diagram provides some symbol that is known as the diagramming tool.  
Users:The users of the ER diagram are applications, software, and websites.  

What is Hotel Management System?

The hotel management system is a type of software that is a collection of hotel management apps that runs things smoothly. This software contains customer relationship management software, accounting software, and a huge number of industry-specified programs.

What is an ER Diagram?

We can also call ER diagram the database design for the hotel management system project. The ER diagram is like a picture that contains how all the entities are related to each other. The most important part of the ER diagram is Relationships, Attributes, and Entities. 

Importance of ER Diagram

The ER diagram for the project is the foundation for the building of the database of the project. The properties, datatypes, and attributes are defined by the ER diagram.

ER Diagram for Hotel Management System

The ER diagram for the hotel management system, the system data, and their attributes. The data and the attributes are represented by the table, and the table shows how they are related to each other.

Database design for the Hotel management system

ER Diagram for Hotel Management System

The above diagram shows the database design for the hotel management system. This database design shows all the system data, and the output for the user ate stored in the database. In DBMS, a good ER diagram is needed for the creation of a hotel management system.

Hotel Management System ER Diagram Tables

The below table shows all about the field name of the table, description, datatype, and character length. Each table of the ER diagram defines and explains the data storage. 

The field column lists all the attributes of the database that describes each column. The types table of the database shows what kind of data each attribute is, and the length shows how many characters it has.

Table Name: tblCustomer

FieldDescriptionTypeLength
cust_ID (PK)Customer IDInt11
custfnameCustomer First NameVarchar255
custlnameCustomer Last NameVarchar255
reservationCustomer ReservationVarchar255
addressCustomer AddressVarchar255
statusCustomer StatusVarchar255
contact_addressContact Addressint11

Table Name: tblRoom

FieldDescriptionTypeLength
room_ID (PK)Room IDInt11
room_typeRoom TypeVarchar30
room_sampleRoom SampleVarchar30
descriptionRoom DescriptionText 

Table Name: tblReservation

FieldDescription  TypeLength
reservation_ID (PK)Reservation IDInt11
customer_ID (FK)Customer IDInt11
room_ID (FK)Room IDInt11
reservation_dateDate of ReservationDate 
date_inDate of Coming InDate 
date_outDate of Coming OutDate 
days_rangeRange of DaysInt11

Table Name: tblRoomClass

FieldDescriptionTypeLength
class_ID (PK)Room Class IDInt11
nameRoom NameVarchar30
priceRoom PriceInt11

Table Name: tblPayment

FieldDescriptionTypeLength
payment_ID (PK)Payment IDInt11
customer_ID (FK)Customer IdInt11
typePayment TypeVarchar30
payment_dateDate of PaymentDate 

Table Name: tblEmployees

FieldDescriptionTypeLength
employee_ID (PK)Employee IdInt11
fnameFirst NameVarchar30
lnameLast NameVarchar30
job_departmentJob DepartmentVarchar30
addressAddressText
contact_addressContact AddressInt11
usernameUsernameVarchar30
passwordPasswordVarchar30

Table Name: tblTransactions

FieldDescriptionTypeLength
transaction_ID (PK)Transaction IDInt11
transaction_nameTransaction NameVarchar30
customer_ID (FK)Customer IDInt11
employee_ID (FK)Employee IDInt11
reservation_ID (FK)Reservation IDInt11
transaction_dateTransaction DateDate

Table Name: tblReports

FieldDescriptionTypeLength
report_ID (PK)Report IDInt11
transaction_ID (FK)Transaction IDInt11
nameReport nameVarchar30
typeReport TypeVarchar30

With the help of the above tables, we can set up the database for the hotel management system. It provides the full description of the database with its table names. They will enter all the values and attributes for the database in the table.

How to Create ER Diagram

We can create the ER diagram for the table just in 5 minutes. There are some steps, and with the help of these steps, we can build the ER diagram for the hotel management system project. The steps are as below.

Step-1:

We have to familiarize ourselves with the entity relationship diagram cardinality and symbols. Then we have to show the data structure for the project in the entity relationship diagram. The symbol of the entity relationship diagram shows how they fit together. Before making the ER diagram, we should properly know the meaning of all the symbols and how to use all of them symbols.

Symbol of entity relationship diagram:-

  1. Fields: This entity shows how the different types of data are used together for a project. The symbol is used to show how the part of the project is working.
  2. Key: It is a type of technique that is used to categorize the quality of the data. There are two types of keys available for the database. These are as follows.
    • Primary key: It is a set of unique properties that are used for finding the specific entity.
    • A foreign key: It is a type of key made up of a piece of data with too many links to other things.

Step 2: Finalize the entities included

Start making your ER Diagram by deciding on all the parts your hotel management system must have. You’ll need to leave the area in your design for these rectangles to be included later.

Step 3: Add the attributes of each entity

After you’ve decided on the entities, think about the traits you’ll need for each one. In a conceptual ER diagram, the details of the different entities are given as attributes. Attributes are things like a thing’s traits, a many-to-many relationship, or a one-to-one relationship. Attributes with multiple values can be given more than one value.

Step 4: Describe the relationships (cardinality) between entities and attributes

You will need the entities, their attributes, and the relationships between them in order to plot the relationships between the ERD. To get the right entity relationship diagram, you will use the information you gathered to build the data structure.

Conclusion

You need to know how the Hotel Management System was designed and built using diagrams. With the help of an ER diagram will help you make a system that works well.

Making it will help you understand how the software works behind the scenes. This is where all the data that goes in and out of the system will be stored.