How does the oracle determine if multiple fields are empty?

You can use the COALESCE function in Oracle to determine if multiple fields are empty. The COALESCE function accepts multiple parameters and returns the value of the first non-empty parameter. If all parameters are empty, it returns NULL.

For example, suppose there is a table called employees, with fields such as name, age, and address. You can use the following query to check if these three fields are empty:

Choose employees who have missing information in their name, age, or address fields.

If the query returns no results, it means that at least one of the fields – name, age, and address – is empty.