A database is a comprehensive collection of related data organized for convenient access, generally in a computer.
When you create a database, you define its structure by assigning names and data types to all the fields. This process involves specifying the tables, fields, and relationships between them to organize and store data efficiently. By defining the database schema, you establish the blueprint for how data will be stored and accessed within the database.
The first step in creating a database is to define the purpose and scope of the database, including identifying the data that needs to be stored and how it will be organized. This involves understanding the requirements of the system and the relationships between different data elements.
In databases, properties are attributes or characteristics of database elements such as tables, columns, or indexes. They define specific settings or configurations that determine how the database or its elements behave. Properties can be used to control various aspects of data storage, retrieval, indexing, and performance within a database system.
A "schema-on-read" database is one that allows users to define the structure of the data as they access it, rather than enforcing a predefined schema. This approach allows for flexibility in data organization and analysis, making it a popular choice for big data and analytics applications.
Field characteristics in a database are used to define the properties and constraints of a specific field, such as data type, length, and validation rules. They help ensure data integrity, accuracy, and consistency within the database by specifying how data should be stored and validated. These characteristics help to maintain the quality and reliability of the data stored in the database.
schema
A database consists of an organized collection of data for one or more multiple uses
DDL Statments
There are following types of users: § Database Administrators § Security Officers § Network Administrators § Application Developers § Application Administrators § Database Users
data model
SQL (Structured Query Language) enables a database administrator to define schema components, such as tables, columns, indexes, and relationships in a database. By using SQL commands like CREATE TABLE, ALTER TABLE, and CREATE INDEX, administrators can create and modify the structure of a database according to their requirements.
Structure
When you create a database, you define its structure by assigning names and data types to all the fields. This process involves specifying the tables, fields, and relationships between them to organize and store data efficiently. By defining the database schema, you establish the blueprint for how data will be stored and accessed within the database.
A computer database is a collection of information with a common connection - whether that's a stock list for a shop - or a mailing list for a mail-order company.
Data is any fact of information that makes sense . Database is a collection of interrelated data.
When you initially create a database, you define its filters.
An Entity Relationship Diagram is one graphical method. A dataflow diagram is another way of looking at a system for which you will design a database.