Primary Key vs Foreign Key - shikshaglbe

A Primary Key is a column that uniquely identifies each row in a table. A Foreign Key is a column that contains the Primary Key of another table.The Primary Key ensures that there are no duplicate rows in a table. The Foreign Key ensures that there are no orphaned rows in a table.A primary key is a unique identifier for a record in a database table. A foreign key is a field in a relational table that matches the primary key of another table. The foreign key can be used to cross-reference tables. A foreign key with the same name and type as the primary key it references is called a natural foreign key. Foreign keys can also be artificial or composite.A primary key is a column in a table that uniquely identifies each row in the table. A foreign key is a column in a table that matches the primary key of another table. The purpose of a foreign key is to ensure the data integrity of the relationships between tables.A primary key is a column in a table whose values uniquely identify each row in the table. A foreign key is a column in a table that contains values that match the primary key of another table. Foreign keys allow you to create relationships between data in different tables.A primary key is a column or set of columns in a relational database table that uniquely identifies each row in the table. A foreign key is a column or set of columns in one table that corresponds to a primary key in another table. Foreign keys allow you to create relationships between data in different tables.A primary key is a column or set of columns in a table that uniquely identifies each row in the table. A foreign key is a column or set of columns in one table that identifies a column or set of columns in another tabA primary key is a unique identifier for a record in a database table. le. Foreign keys allow you to create relationships between tablesA primary key is a unique identifier for a record in a database table. A foreign key is a field in a relational table that matches the primary key of another table. The foreign key can be used to cross-reference tables.A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables. It is used to identify the row (s) in one table that corresponds to the row (s) in another table. A foreign key is also known as a reference key or a linked field. A primary key is a column or group of columns in a relational database table that uniquely identifies each row in the table. A primary key cannot be null and must have a unique value for each row. A foreign key can be null, but it must have a unique value for each row.A primary key is a unique identifier for a record in a database table. A foreign key is a field in a relational table that matches the primary key column of another table. The foreign key can be used to cross-reference tables. In practice, this means that if two tables have a foreign key relationship, you can use the foreign key field in one table to look up data in the other table.


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