Basic Guide to Design a Better Database Schema

Things you should keep in mind while designing database schema for your application.

So let’s talk about designing a database schema, there are actually two major problems beginners mostly do while designing.

  1. The first and very common problem is not dividing the table into multiple table, instead using one common table to have lots of data. Which actually cause few problems since our table gonna have huge amount of data, that could actually make data read/write operations to pretty slow because MySql generally does linear search if data is not indexed. It also make the management of data little harder because we have made it complete mess xP
  2. The second again very common problem is diving the schema into so many tables which could actually make your queries little faster but not in every case because we’re actually having lots of table which mean have to apply lots of joins while retrieving data, that could actually make your queries slower and little bit complex too. Other problem is having management issue because of so many tables and little bit of wastage of storage too.

There is nothing right and wrong about design it’s all about good design so we ‘ll discuss few tips and tricks to design a good database schema.

Let’s decide how many table your database should roughly have!

There is very simple approach to roughly decide, how many tables you should have is to total number of unique entity your application gonna have. Number of tables could be more than that too while normalizing the database schema, we’ll discuss further in the post how to do that too, and number of tables could be less than the unique number of entities too, so you guys are thinking how, right?

so let’s take a simple example to understand this scenario, suppose you have entities like employee, supervisor or manager. Here we have two entities but there is no need to make the separate tables for both the entities because both are the employee to a company with just different privileges so we can just have a self relation to represent both the entities with just one table.

So the thumb rule for roughly deciding number of tables is

## of table = ## of unique entities your application have

if you aren’t familiar with the basics of MySql then I would recommend to have a look at this Basics of MySql

When to divide the table into multiple tables and why?

let’s discuss the theoretical approach first, wait theoretical approach could little bit tedious to understand so let’s discuss the practical approach instead which is easy to understand too.

  • Whenever you feel that you’re gonna have redundant values in any of your column that directly indicates that your design is not good enough and you should separate that column from the current table so that it won’t have redundant values.

—** why**: because this leads to few problems like updating a common value having multiple records, suppose you have records something like this

#optimization #schema #mysql #database #database-design

What is GEEK

Buddha Community

Basic Guide to Design a Better Database Schema

Basic Guide to Design a Better Database Schema

Things you should keep in mind while designing database schema for your application.

So let’s talk about designing a database schema, there are actually two major problems beginners mostly do while designing.

  1. The first and very common problem is not dividing the table into multiple table, instead using one common table to have lots of data. Which actually cause few problems since our table gonna have huge amount of data, that could actually make data read/write operations to pretty slow because MySql generally does linear search if data is not indexed. It also make the management of data little harder because we have made it complete mess xP
  2. The second again very common problem is diving the schema into so many tables which could actually make your queries little faster but not in every case because we’re actually having lots of table which mean have to apply lots of joins while retrieving data, that could actually make your queries slower and little bit complex too. Other problem is having management issue because of so many tables and little bit of wastage of storage too.

There is nothing right and wrong about design it’s all about good design so we ‘ll discuss few tips and tricks to design a good database schema.

Let’s decide how many table your database should roughly have!

There is very simple approach to roughly decide, how many tables you should have is to total number of unique entity your application gonna have. Number of tables could be more than that too while normalizing the database schema, we’ll discuss further in the post how to do that too, and number of tables could be less than the unique number of entities too, so you guys are thinking how, right?

so let’s take a simple example to understand this scenario, suppose you have entities like employee, supervisor or manager. Here we have two entities but there is no need to make the separate tables for both the entities because both are the employee to a company with just different privileges so we can just have a self relation to represent both the entities with just one table.

So the thumb rule for roughly deciding number of tables is

## of table = ## of unique entities your application have

if you aren’t familiar with the basics of MySql then I would recommend to have a look at this Basics of MySql

When to divide the table into multiple tables and why?

let’s discuss the theoretical approach first, wait theoretical approach could little bit tedious to understand so let’s discuss the practical approach instead which is easy to understand too.

  • Whenever you feel that you’re gonna have redundant values in any of your column that directly indicates that your design is not good enough and you should separate that column from the current table so that it won’t have redundant values.

—** why**: because this leads to few problems like updating a common value having multiple records, suppose you have records something like this

#optimization #schema #mysql #database #database-design

Brain  Crist

Brain Crist

1600347600

SCHEMAS in SQL Server -MS SQL Server – Zero to Hero Query Master

Introduction

This is part 3 of “MS SQL Server- Zero to Hero” and in this article, we will be discussing about the SCHEMAS in SQL SERVER. Before getting into this article, please consider to visit previous articles in this series from below,

A glimpse of previous articles
Part 1

In part one, we learned the basics of data, database, database management system, and types of DBMS and SQL.

Part 2
  • We learned to create a database and maintain it using SQL statements.
  • Best practice methods were also mentioned.

#sql server #benefits of schemas #create schema in sql #database schemas #how to create schema in sql server #schemas #schemas in sql server #sql server schemas #what is schema in sql server

Edison  Stark

Edison Stark

1598164783

How to Make a Good Database Design?

How to make a good database design? Why we should create a good design database? Database design is an essential skill of a software engineer. In some interviews, the interviewer can ask you a few questions about it. As far as I know, we have some database principles. There are a lot of definitions about them and you can search on google for more details. Based on my experience, I’ll write it simply.

After reading this article, you will understand things:

  • What is a good database design? Why we should create a good design database? How to make a good database design?
  • Design process
  • Define and use some rules
  • Normalization Rules
  • Integrity Rules
  • Column Indexing
  • Some notes and advice when we design a database

Database Design Overview

Firstly, What is database design?

“Database Design is the organization of data according to a database model. The designer determines what data must be stored and how the data elements interrelate.” Source: wikipedia.org

Database design is a part of the Design Process when we develop software. Before doing database design, we have to complete software architecture (N-tier layer, Microservice, …) at the high-level. Database design is a very important step at the low-level. Design Process often creates by Senior Software Engineer or Software Architect who has a lot of experience in the IT field.

Image for post

Development Process. Source: Internet.

With a medium or big system, we usually choose and combine some databases to achieve our purpose. We need to support transactions and relationships: MySQL or PostgreSQL or SQL Server. We need to save flexible data: MongoDB(unstructured data). Support caching (Redis: key-value, sorted set, list, …), support full-text searching(Elastic Search, …), and so on.

Depends on your project, you should choose and combine some databases appropriately and wisely. There’s not the best database, only have database appropriately. We should take advantage of databases and know the limit/issues of them. In this article, I’ll only write about DBMS(Database Management System): MySQL. The reason is it’s complex more than NoSQL database such as MongoDB, Redis, and so on.

In some projects, the Senior Software Engineer or Solution Architect could request to make a Class Diagram and ERD (Entity Relationship Diagram). What the difference between the Class Diagram and ERD?

  • The class diagrams are **used to represent the main object or building block**of the system. They are used to **_show the relationship of one class with another _**and also represent the attributes of the system.
  • However, and ERD is more of a database in the form of tables. They don’t show individual relationships but relationship sets as well as sets of entities. They show the type of information that needs to be stored in the database.

In my opinion, we should make ERD and don’t create Class Diagrams unless we have some special reasons. This depends on your project.

#erd #database-design #good-database-design #design-db-process #database

Landscapes Website Design | Nature Landscapes Website Designer

Most landscapers think of their website as an online brochure. In reality of consumers have admitted to judging a company’s credibility based on their web design, making your website a virtual sales rep capable of generating massive amounts of leads and sales. If your website isn’t actively increasing leads and new landscaping contracts, it may be time for a redesign.

DataIT Solutions specializes in landscape website designing that are not only beautiful but also rank well in search engine results and convert your visitors into customers. We’ve specialized in the landscaping industry for over 10 years, and we look at your business from an owner’s perspective.

Why use our Landscapes for your landscape design?

  • Superior experience
  • Friendly personal service
  • Choice of design layout
  • Budget sensitive designs
  • Impartial product choice and advice
  • Planting and lighting designs

Want to talk about your website?
If you are a gardener or have a gardening company please do not hesitate to contact us for a quote.
Need help with your website?
Get in touch

#nature landscapes website design #landscapes website design #website design #website designing #website designer #designer

UI/UX Design Principles: Guide to Perfect App Designing Process - TopDevelopers.co

Following the app design process and UI/UX design principles rightly guide UI/UX designers to purvey app designs that help in developing efficient mobile apps.
In this article, we will discuss a perfect app designing process that will help you build a mobile app with a great design that attracts the targeted audience and increases user engagement, hence boosting the conversion rate for an app.

#role of ui & ux design in app development #app design tips to follow #ui/ux design strategies #app designing process #ui/ux designers #ui design