Published at LXer:
In a relational database system the data is organized in tables, composed by rows and columns. Each row is an instance of the entity represented by the table, with the columns used as its properties. Relationships between tables are established by the use of foreign keys, and the statement with which we can perform queries that span over multiple tables it's called a join. In this tutorial we will see the different type of joins available when using MySQL or MariaDB.
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