What is outer join used for?

Question

The FULL OUTER JOIN (aka OUTER JOIN ) is used to return all of the records that have values in either the left or right table. For example, a full outer join of a table of customers and a table of orders might return all customers, including those without any orders, as well as all of the orders. 2 апр. 2021 г.

In which case would you use an outer join?

Explanation: OUTER JOIN is utilized for returning data from all rows from both the joined tables that satisfy JOIN condition and return all data from the rows which does not satisfy the same JOIN condition. The OUTER JOIN should be used utilized within the JOIN condition only.

When to use outer join and inner join?

In SQL, a join is used to compare and combine — literally join — and return specific rows of data from two or more tables in a database. An inner join finds and returns matching data from tables, while an outer join finds and returns matching data and some dissimilar data from tables.

What is outer join and why it is used explain its type with example?

Outer Join is a join that can be used to return the records in both the tables whether it has matching records in both the tables or not. The outer join can be further divided into three types: Left-Outer Join. Right-Outer Join.

What is inner join used for?

Inner joins combine records from two tables whenever there are matching values in a field common to both tables. You can use INNER JOIN with the Departments and Employees tables to select all the employees in each department.

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