Using the IF Condition in SQL with an Oracle Database

Using the IF Condition in SQL with an Oracle Database

The conditional retrieval of data is a typical requirement. You retrieve the content and make some decisions on that data in your code before using it. This is a two step process. With an Oracle database, you can achieve this in one step with a single SQL statment. The statement uses the DECODE function, which gives the equivalent of if – elseif – elseif – endif block.

SELECT DECODE(min(balance),0,0,max(balance)) from tblBankBal

First, the value of min(balance) (the first argument) is computed. It is then checked with zero(0)(the second argument). That means if (min(balance) == 0), then the third argument is returned. If they are not equal then the fourth argument is returned, in this case it will be the max(balance).

Here’s the code:

SELECT DECODE(min(balance),0,0,max(balance)) from tblBankBal
See also  Monetize TikTok For Your Business

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist