SQL

SQL – Foreign Key and its use in Database

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Primary Key Constraint

In relational databases, a Foreign Key is a crucial concept that helps establish a connection between two tables. It plays a significant role in ensuring data integrity by enforcing referential constraints between records in different tables. By linking one table’s field to the primary key of another table, foreign keys create relationships that allow for … Read more

SQL – Primary Key and its use in a Database

by
Primary Key Constraint

In this article you will learn about- What is primary Key?  A primary key can be defined in either a CREATE TABLE statement or an ALTER TABLE statement. Databases use keys to compare, sort, and store records, and to create relationships between records. Choosing the primary key in a database is one of the most … Read more