This tutorial shows you how to use the Oracle DECODE () function to add the procedural if-then-else logic to SQL queries.

This Oracle tutorial explains how to use the Oracle / PLSQL DECODE function with syntax and examples. The Oracle / PLSQL DECODE function has the functionality of an IF-THEN-ELSE statement.

In a DECODE function, Oracle considers two nulls to be equivalent. If expr is null, then Oracle returns the result of the first search that is also null. The maximum number of components in the DECODE …

Aug 6, 2024 · This tutorial provides a comprehensive guide to using the SQL DECODE() function in Oracle. I will also compare DECODE() to CASE WHEN in Oracle and help you understand when to …

Feb 19, 2015 · The purpose of the Oracle DECODE function is to perform an IF-THEN-ELSE function. It's similar to a CASE statement, but CASE is a statement where DECODE is a function.

Oracle automatically converts the values for expression and compare_value to the datatype of the first compare_value. Also the datatype of the return_value is converted to the datatype of the first …

Jan 25, 2026 · Oracle decode is the method in the Oracle database to transform data values from one value to another which is better to understand. Oracle Decode transforms data values at retrieval time.

Nov 8, 2025 · Learn the Oracle DECODE function. This simple SQL guide explains how to use DECODE for IF...THEN...ELSE logic in your queries.

The DECODE function in Oracle is a versatile and powerful tool that allows users to perform conditional transformations on data within an SQL query. It is similar to the CASE statement, but it offers a more …

Mar 11, 2025 · Learn how to use the Oracle DECODE function in Oracle SQL to simplify queries and handle conditional logic with ease in this comprehensive guide.