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.

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 …

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 …

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.

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 …

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 …

If the first result has the datatype CHAR or if the first result is null, then Oracle converts the return value to the datatype VARCHAR2. Note: two null values are considered equivalent in the decode statement.

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.

Feb 21, 2025 · DECODE compares the expression to each search value one by one. If expression is equal to a search, then the corresponding result is returned by the Oracle Database. If a match is not …