Oracle INTERSECT Operator
In Oracle, INTERSECT Operator is used to return the results of 2 or more SELECT statement. It picks the common or intersecting records from compound SELECT queries.
1) expression1, expression2, ... expression_n: It specifies the columns that you want to retrieve.
2) table1, table2: It specifies the tables that you want to retrieve records from.
3) conditions: it specifies the conditions that must be fulfilled for the records to be selected.
Oracle INTERSECT Example: (with single expression)
In the above example, the supplier_id appears in both the suppliers and order_details table. Now the common entries will be returned in the result set.
Oracle INTERSECT Example: (with multiple expressions)
The above example returns the records from the supplier table where the supplier_id, last_name and first_name values match the customer_id, last_name, and first_name value of customer table.