When working with databases, it’s common to need data from multiple tables at the same time. SQL Joins allow you to combine records from two or more tables in a relational database based on a related column between them. This post will cover the different types of SQL joins, their syntax, and practical examples for … Read more
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
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