Types of Joins in SQL for Oracle: Explained

SQL Joins in Oracle allow users to retrieve data from multiple tables based on a related column between them. There are several types of Joins in SQL, including:

1. Inner Join: Returns records that have matching values in both tables.
2. Left Join (or Left Outer Join): Returns all records from the left table and the matched records from the right table.
3. Right Join (or Right Outer Join): Returns all records from the right table and the matched records from the left table.
4. Full Join (or Full Outer Join): Returns records when there is a match in either left or right table.
5. Cross Join: Returns the Cartesian product of the two tables involved.
6. Self Join: Joins a table with itself based on a related column.

Each type of Join serves a specific purpose and understanding them is essential for database querying and data retrieval in Oracle.

Mastering the different types of Joins in SQL can greatly enhance your ability to write efficient and effective queries in Oracle, ultimately leading to optimized database performance.