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For UPDATE and DELETE operations, the cursor identifies the rows that would be affected.Instead of fetching data into a record, you can also fetch data from the cursor to a list of variables.The fetch action retrieves data and fills the record or the variable list. You can fetch the data until there is no record found in active result set.You can name a cursor so that it could be referred to in a program to fetch and process the rows returned by the SQL statement, one at a time.There are two types of cursors − Implicit cursors are automatically created by Oracle whenever an SQL statement is executed, when there is no explicit cursor for the statement.
You can use the RETURNING BULK COLLECT INTO clause with the EXECUTE IMMEDIATE statement to store the results of an INSERT, UPDATE, or DELETE statement in a set of collections.