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What is Database?

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Databases, systems that enable data to be stored and managed in a organized way. Nowadays, mobile apps from websites are used in many areas from e-commerce platforms to banker.

In this article What is the database, how does it work, database types, management systems and frequent problems? We will talk about the topics in detail.

1. What is Database?

Database, a system used to store, access and manage large amounts of data regularly and efficiently. It allows users to easily question, update and analyze information.

???? Sample Uses:

  • Web Sites: User accounts, product information, order records
  • Banking Systems: Customer information, account movements
  • E-Trade: : Product inventory, customer orders
  • Mobile Applications: User data, messages

A database, composed of tables, lines and columns works with a structure.

2. What Are Database Types?

Databases divided into different types according to the structure and purpose of use. Here are the most widely used database types:

A. Associated Databases (Relational Databases - RDBMS)

This database model, stores data in tables and makes it associated with each other. . SQL (Structured is managed using Query Language).

???? Popular Associated Databases:

  • MySQL (It is common for websites and applications)
  • PostgreSQL (Advanced data management)
  • Microsoft SQL Server Server (for financial solutions)
  • Oracle Database (for large-scale businesses)

Sample:
Customer Information Table

ID Home Home E-Mailing
1 2 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 Home Kaya Kaya ahmet@email.com
1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 4 2 3 4 2 3 4 2 3 4 2 2 2 2 2 2 2 2 3 4 5 2 3 4 5 2 2 2 3 4 5 2 3 4 5 2 2 2 2 2 2 2 2 2 3 4 5 2 2 3 4 2 3 4 5 2 2 3 4 5 2 2 3 4 5 2 2 2 3 4 5 2 3 4 5 2 2 3 4 5 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 4 5 2 3 4 2 2 2 2 2 2 3 4 5 2 2 2 2 2 3 4 5 2 3 4 5 2 3 4 5 Zeynep Home zeynep@email.com

B. NoSQL Databases

NoSQL databases, developed to store and manage large data with flexible data structures. .

???? NoSQL Types:

  • Document Based (MongoDB)
  • Key-Value Warehouse (Redis, DynamoDB)
  • Graf Databases (Neo4j)

???? Features:
✅ High speed data processing
✅ Flexible and scalable structure
✅ Ideal for big data and real-time analysis

C. In Memory (In-Memory) Databases

These databases, data instead of disk RAMProvides very fast access by storing it in .. .

???? Samples:

  • Red (for suspension and session management)
  • Memcached (To ensure quick data access)

D. Cloud Based Databases

These databases, is managed by online services and accessed via the internet. .

???? Samples:

  • Google Home SQL
  • Amazon RDS
  • Microsoft Azure SQL

???? Advantages:
✅ Easy management and maintenance
✅ High accessibility
✅ Automatic scalability

3. Database Management Systems (DBMS) What is it?

One Database Management System (DBMS), is a software used to create, edit, store and manage data. .

???? Most Common DBMS Software:

  • MySQL
  • PostgreSQL
  • Oracle Database
  • MongoDB
  • Microsoft SQL Server Server

???? DBMSBenefits of:
✅ Provides data security
✅ Fast and easy access
✅ Protects the consistency of data

4. Database Installation and Management

You can follow the steps below to create and manage the database:

???? Step 1: Database Server Setup

  • MySQL veya PostgreSQL gibi bir DBMS yükleyin.

???? Step 2: Create Database and Tables

sql
CREATE DATABASE firma_veritabani; USE firma_veritabani; CREATE TABLE musteriler ( id INT PRIMARY KEY AUTO_INCREMENT, ad VARCHAR(50), soyad VARCHAR(50), email VARCHAR(100) );

???? Step 3: Adding Data and Update

sql
INSERT INTO musteriler (ad, soyad, email) VALUES ('Ahmet', 'Kaya', 'ahmet@email.com'); UPDATE musteriler SET email='ahmetkaya@email.com' WHERE id=1;

???? Step 4: Data Inquiry

sql
SELECT * FROM musteriler WHERE ad='Ahmet';

???? Step 5: Backup and Security Measures

  • Regularly backup (()mysqldump with command)
  • Configure authorization and access controls

5. Database Problems and Solutions

1. Connection Error (Connection Error)

???? Solution:

  • Check the database server works.
  • Make sure the username and password information are correct.

2. Slow Working Issue

???? Solution:

  • Remove unnecessary indexes and optimize queries.
  • Use Database caching (Redis, Memcached).

3. Data Consistency

???? Solution:

  • Use data integrity restrictions (PRIMARY KEY, FOREIGN KEY).
  • Follow changes by backing up updated data.

Conclusion: Database Management is the Basic of the Digital World

Databases, today plays a critical role in the world of data-oriented. When correctly managed, databases offers fast, reliable and scalable solutions. .

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