How to use nested statements in Oracle delete command

In Oracle database, you can use the DELETE statement for deletion operations. Nested statements refer to using a subquery within the DELETE statement to specify the deletion conditions.

Here is an example of using nested DELETE statements:

DELETE FROM table_name
WHERE column_name IN (SELECT column_name FROM another_table WHERE condition);

In the above example, you can substitute “table_name” with the table name of the records to be deleted, “column_name” with the column name of the condition to be deleted, “another_table” with the table name containing the subquery, and “condition” with the condition of the subquery.

Please note that the subquery must return a list of columns to specify the records to be deleted. Additionally, the subquery can have more complex filtering criteria based on your requirements.

Please make sure to carefully consider and backup data before using the DELETE statement to perform any deletion operations, in order to avoid accidentally deleting unnecessary records.