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Write SQL Keywords in capital letters
Use table aliases with columns when are are joining multiple tables
Never use *, always mention list of columns in select clause
Add useful comments wherever you write possible for better performance
Create CTEs instead of multiple sub queries, it will make your query easy to read
Join tables using JOIN Keywords instead of writing join condition in where clause for better readability
Never use order by in sub queries, It will unnecessary increase runtime
if you know there are no duplicates in 2 tables, use UNION ALL instead of UNION for better performance.
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Conceptual Model using ERD
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Physical Model Implementation
Data manipulation and query
Persistent Stored Modules
Important MySQL Area In which you can get Help
MySQL Database Design Help(Hire Database Designing Expert)
What is MySQL database design? Database Design is a collection of processes that facilitate the designing, development, implementation and maintenance of enterprise data management systems. Properly designed database are easy to maintain, improves data consistency and are cost effective in terms of disk storage space.
Why database design is important?
IIt helps produce database systems
That meet the requirements of the users
Have high performance.
MySQL Database Modelling
Two database models used to design database: Logical Model, Physical Model
This stage is concerned with developing a database model based on requirements. The entire design is on paper without any physical implementations or specific DBMS considerations.
This stage implements the logical model of the database taking into account the DBMS and physical implementation factors.
MySQL Database Implementation(Hire Expert for database Implementation)
In database implementation we have used below two methods:
Data conversion and loading - this stage of relational databases design is concerned with importing and converting data from the old system into the new database.
Testing - this stage is concerned with the identification of errors in the newly implemented system. It checks the database against requirement specifications.
ER Diagram(Hire Expert to create ER Diagram)
Entity Relationship Model (ER Modeling) is a graphical approach to database design. It is a high-level data model that defines data elements and their relationship for a specified software system. An ER model is used to represent real-world objects
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Schema Diagram(Hire Expert to create Schema Diagram)
A database schema defines how the data is organised using the schema diagram. A schema diagram is a diagram which contains entities and the attributes that will define that schema. A schema diagram only shows us the database design.
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Here you can get any queries related help related to MySQL database, if you need help in any query related to INSERT, UPDATE, DELETE, JOIN, TRIGGER, PROCEDURE, TANSACTION, etc. then contact us and get instant help with affordable prices.
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System modeling is a framework utilizing graphical documentation, which is often dependent on documentations in the Unified Modeling Language (UML). It is used to convey the usefulness of the framework and the models to be utilized.
Different models can be developed to represent the system from different perspectives:
An external perspective, where you model the context or environment of the system.
An interaction perspective, where you model the interactions between a system and its environment, or between the components of a system.
A structural perspective, where you model the organization of a system or the structure of the data that is processed by the system.
A behavioural perspective, where you model the dynamic behaviour of the system and how it responds to events.
Types of UML Diagrams In Which You Can Get Help
In the case of Activity Diagrams, the exact purpose of it in the case of the requirements given previously was made to demonstrate the process of how a customer would book for a room in a Hotel Room. To do this, the Microsoft program Visio was used for the reason that it had all the appropriate graphical UML diagrams. From there, the “UML Activity” option was picked to get the necessary parts for the diagram. The requirements given previously, involving the conditions of what to do when a “Single room is full” was also combined to the diagram. Each step was carefully decided and compared with what booking is like in real life hotels. Overall, a graphical representation was created in its place to display what the system would look like in this scenario.
State Chart Diagram:
A state chart diagram is used to model the behavior of a class when faced with outward forces. This is shown here . There are few different notations for state chart diagrams. Those notations are: states, transition, initial state, final state ,synchronization and splitting of the control. In this case a state chart diagram was used to show how each user would interact with the system. This was created using Microsoft Visio using the “UML State Machine” option.
Use Case Diagram:
Use case diagram is summarising all the users and software's details. Use case diagram shows all the functions which software should include and normally it will divide into two parts: actor and use case diagram as it is available at the Appendix part, our actors are administrator and receptionist . For better understanding of the software and its functions more details has been added to the table at the Appendix. All the information which has been added in this use case diagram has been answered by the hotel company.
The program Visio was used to create the Class diagram by using the “UML Class” option to demonstrate each of the classes in the system, their properties, methods and relationship to the other classes in systems. All of the properties and methods were decided based on the information provided from the client, this helped to construct the relationship among the classes. Note in the class diagram that the relationships are denoted by a blue line with the exception being where the lines cross each other. Thus, a different color line was chosen so that it would be easier to read.
A sequence diagram is a kind of communication diagram since it portrays how—and in what order—a gathering of articles cooperates. These diagrams are utilized by programming designers and business experts to comprehend necessities for other requirements or to report a current interaction. Sequence diagrams are here and there known as occasion diagrams or occasion situations. The program Visio was utilized to make the arrangement outline by utilizing the "UML Sequence" choice to show the sequence.
The architectural design of the system is a way in which a graphical representation
is used to show how a software system should be organised according to the given requirements and through abstraction. This is tasked with linking the most high-priority requirements to create a basis for how a program should run. This diagram was constructed using Visio. Lines were coloured differently so that it would be easier to see where a particular line was going.
Database Desining Help
Database Design With Normalization
A relation can be placed in various normal forms. These normal forms have been proposed to solve the problem of modification anomalies arising from various sources. Before discussing the normal forms, the necessary terminologies in Relational Model are first explained. We consider two main sources of modification anomalies: functional dependency and multivalued dependency. A procedure identifies which relation the data that should go into. The result of this procedure is that the relations produced are in Boyce Codd Normal Form (BCNF) and in Fourth Normal Form (4NF), thus removing modification anomalies arising from functional dependencies and multivalued dependencies.
Database Design With Entity Relationship Model
The data requirements are depicted in a data model using the various types of entities: strong, weak and identifying entities, and various types of relationships: strong, weak and identifying relationships. For each relationship, the maximum and minimum cardinalities are determined from the data requirements so that we know how many instances of another entity one instance of an entity may relate to. When the data model is verified to be correct, that is, the data requirements are correct, the entities and relationships will be transformed into relations with referential integrity constraint.
We look also at the various design patterns in data modelling. Knowing these patterns will help us use time-tested solutions for specific data requirements in our data model.
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Types of Database Normalization: First Normal Form (1 NF), Second Normal Form (2 NF), Third Normal Form (3 NF), Boyce Codd Normal Form or Fourth Normal Form ( BCNF or 4 NF), Fifth Normal Form (5 NF), Sixth Normal Form (6 NF)
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Other Database Related Help
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Their are many features that are makes it better compare to other databases:
And more others
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We are also providing SQL database analysis and case study assignment help. Below the sample case study paper:
A retail store would like to understand customer behaviour using their point of sale data(POS).
Dataset has three tables that use to analyze and comprises result:
Customer: Customer demographics
Transaction: Customer Transaction Details
Product Category: Product Category and sub Category information
Data Preparation and Understanding
What is the total number of rows in each 3 tables in the database?
What is the total number of transactions that have a return?
What is the time range of the transaction data available for analysis?
Which product category does the sub-category "DIY" belongs to?
Which channel is most frequently used for transactions?
What is the count of male and female customers in database?
From which city do we have the maximum number of customers and how many?
How many sub-categories are there under the books category?
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