JOINS | SQL JOINS | INNER JOIN | OUTER JOIN | SELF JOIN | CROSS JOIN | Write Complex SQL Queries
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SQL JOINS are used to combine, retrieve and fetch data from two or more tables, based on a related, common, or matching column between them. In a real-world relational database, data is structured in a large number of tables, and which is why there is a constant need to join these multiple tables based on logical relationships between them.
There are four major types of JOINS that you will learn to write the queries in order to fetch data from multiple tables according to the requirement :
INNER JOIN
OUTER JOINS
CROSS JOIN
SELF JOIN
You will be able to use and write complex and advanced queries using SQL joins to fetch data from multiple tables.