What is outer join?
Posted On: Apr 11, 2020
An outer join is applied to deliver results by connecting lines from two or added tables. But dissimilar to an internal join, the outer join will deliver every line from one detailed table, also if the join state fails. When making an inner join, lines from each record that are unequaled in the different tables are not delivered. In an outer join, unequaled lines in one or either table may be delivered.
There are several kinds of outer joins:
- RIGHT JOIN delivers only unequaled lines from the right record.
- LEFT JOIN delivers only unequaled lines from the left record.
- FULL OUTER JOIN delivers unequaled lines from both tables.
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