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HomeHomework Helpcomputer-scienceDatabase Tables and Relationships

Database Tables and Relationships

The organization and connection of various database tables, such as customer, product, and order tables, to store and manage data, including the relationships between them and the constraints that govern their interactions

beginner
2 hours
Computer Science
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Overview

Database tables are essential components of relational databases, organizing data into structured formats that facilitate easy access and management. Each table consists of rows and columns, where rows represent individual records and columns represent data attributes. Understanding how to create an...

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Key Terms

Table
A collection of related data entries in a database.

Example: A 'Customers' table containing customer names and contact information.

Row
A single record in a table.

Example: One row in the 'Customers' table represents one customer.

Column
A set of data values of a particular type in a table.

Example: The 'Name' column in the 'Customers' table.

Primary Key
A unique identifier for a record in a table.

Example: Customer ID in the 'Customers' table.

Foreign Key
A field in one table that links to the primary key in another table.

Example: Order ID in the 'Orders' table linking to Customer ID in the 'Customers' table.

One-to-Many Relationship
A relationship where one record in a table can relate to multiple records in another table.

Example: One customer can have multiple orders.

Related Topics

Normalization
The process of organizing data to reduce redundancy and improve data integrity.
intermediate
SQL Queries
Learning how to write queries to interact with databases effectively.
intermediate
Data Modeling
The process of creating a data model to visually represent data structures and relationships.
advanced

Key Concepts

TablesRelationshipsPrimary KeyForeign Key