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The SQL statement that is used to make a connection between two or more tables based on the matching columns is called a join. It is mainly used for complex queries.
Different types of SQL joins are mentioned below:
 Inner Join: It is a default join. It returns records when the values match in the joining tables.
 Left Outer Join: It returns all the records from the left table based on the matched records from the right table.
 Right Outer Join: It returns all the records from the right table based on the matched records from the left table.
 Full Outer Join: It returns all the records that match from the left or right table.

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