Selected columns are removed from a table using a relational database's "select" method. It's possible that I'm mistaken.

order db orderid int custid int itemcode int orderquantity int deliverydate date modeofpayment char(1) date_of_order date

Is it more severe to make a mistake in a database than it would be in any other area?

A relational database's select operation may reduce a table's size by removing columns that don't meet particular criteria.Is it right or wrong?

In Oracle database, if we have any field such as Job_Title field in any of our table then we can use DECODE function to sort the result based on our own numerical value. This can be done by including the following in ORDER BY clause: 1: ORDER BY DECODE(job-title,'Manager',3,Assistant',2,'Sales Rep', 1) DESC II: ORDER BY DECODE(job-title,'Manager', 3,'Assistant',2, Sales Rep', 1) ASC III I and II are correct IV I and II are incorrect ||| IV || 1

In a relational database, a select operation may reduce the size of a table by removing columns that don't meet a set of criteria.

In database testing, what do we need to check normally?

In a relational database, a select operation is used to minimize the size of a table by eliminating columns that fulfill certain criteria. Is this correct or incorrect?

How do self-joins enhance query capabilities in relational databases?

How many queries remain before you can determine whether database as a service is the optimal solution for your library's needs?