foreign key,

Meanings

• noun

  A database construct that establishes a link between two tables based on a common column.

  - "The 'customer_id' column in the 'orders' table is a foreign key that references the 'customer' table."
  - "The foreign key ensures data integrity by maintaining referential integrity between the two related tables."

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Variants

List of all variants of foreign key, that leads to same result
foreign , foreignness , foreignnesses , foreign affairs , foreign aid , foreign aids , foreign bill , foreign bills , foreign-born , foreign correspondent , foreign correspondents , foreign exchange , foreign exchanges , foreign minister , foreign ministers , foreign office , foreign offices , foreign policies , foreign policy

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Etymology

origin and the way in which meanings have changed throughout history.

The term 'foreign key' comes from the concept of establishing a link between data in different tables, where the data in one table (the 'foreign' table) is related to data in another table (the 'primary key' table).

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Trivia

Any details, considerations, events or pieces of information regarding the word

1. The first relational database was developed in the late 1960s by Edgar F. Codd.

2. The acronym 'SQL' stands for Structured Query Language, which is a programming language used to manage and manipulate data in relational databases.

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Related Concepts

informations on related concepts or terms closely associated with the word. Discuss semantic fields or domains that the word belongs to

1. Primary key: A primary key is a unique identifier for a record in a database table. It is used to ensure that each record in the table can be uniquely identified and accessed.

2. Relational database: A relational database is a type of database that stores data in tables and allows data to be accessed using relationships between the tables.

3. Database management system (DBMS): A DBMS is software that enables users to define, create, maintain, and manipulate databases.

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Culture

Any cultural, historical, or symbolic significance of the word. Explore how the word has been used in literature, art, music, or other forms of expression.

In database design, the foreign key plays a crucial role in maintaining data consistency and ensuring data accuracy. It is widely used in relational databases and is a fundamental concept in database management systems.

How to Memorize "foreign key,"

1. visualize
   

   - Imagine a foreign key as a bridge that connects two tables in a database. The foreign key in one table references the primary key in another table, allowing data to be related and accessed efficiently.

2. associate
   

   - Associate the foreign key with the concept of data consistency and referential integrity. Remember that the foreign key ensures that data in related tables is consistent and accurate.

3. mnemonics
   

   - Use the mnemonic 'FKey' to remember that a 'Foreign Key' is a database construct used to establish a link between two related tables.

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