Ahmad M. answered 01/17/24
Oracle Database & Infrastructure administrator 6+ years experience
Hi ,
Here are the different types of Join in Oracle database.
The JOIN operations are:
- INNER JOIN operation
- Specifies a join between two tables with an explicit join clause.
- LEFT OUTER JOIN operation
- Specifies a join between two tables with an explicit join clause, preserving unmatched rows from the first table.
- RIGHT OUTER JOIN operation
- Specifies a join between two tables with an explicit join clause, preserving unmatched rows from the second table.
- CROSS JOIN operation
- Specifies a join that produces the Cartesian product of two tables. It has no explicit join clause.
- NATURAL JOIN operation
- Specifies an inner or outer join between two tables. It has no explicit join clause. Instead, one is created implicitly using the common columns from the two tables.
In all cases, you can specify additional restrictions on one or both of the tables being joined in outer join clauses or in the WHERE clause.