So what is the benefit of SQL, also known as Oracle? Well you can keep track of your customers records easily for one thing. Second, it is secure, so no one, unless you give them permission, will access this information. Below you will see one of the basics of SQL.
How to find data inside two specific columns in SQL:
Example: What are the ice cream flavors that use ingredient 1100?
select (Ice_cream_flavor) from ICECREAM WHERE Ice_cream_ID in
(select Ice_cream_ID from RECIPE where Ingredient_ID = ‘1100’) ;
SQL> select Ingredient_name from INGREDIENT where Ingredient_ID in (select Ingredient_ID from RECIPE where Ice_cream_ID IN (201, 540));