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16 Ιαν 2011 · You can use IF() where in Oracle you would have used DECODE(). mysql> select if(emp_id=1,'X','Y') as test, emp_id from emps;
1 Ιουν 2023 · 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. It allows you to provide a value, and then evaluate other values against it and show different results.
Oracle DECODE() function examples. Let’s take some examples of using the DECODE() function to see how it works. A) Use DECODE() function to make data more meaningful. See the following locations table in the sample database:
6 Αυγ 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 use each function. Finally, I will provide code for the equivalent transformations in SQL Server, PostgreSQL, and MySQL.
31 Ιαν 2013 · Just want to compare one example with "case" and "decode". 1. select decode((select deptno from dept d where d.deptno = e.deptno), 10,'A', 20, 'B', 30, 'REST' ) as test from emp e 2. select (case when (select deptno from dept d where d.deptno = e.deptno) = 10 then 'A' when (select deptno from dept d where d.deptno = e.deptno) = 20 then 'B' else ...
Decrypts a string encoded with ENCODE(), or, in Oracle mode, matches expressions.
This Oracle tutorial explains how to use the Oracle/PLSQL DECODE function with syntax and examples. Description. The Oracle/PLSQL DECODE function has the functionality of an IF-THEN-ELSE statement. Syntax. The syntax for the DECODE function in Oracle/PLSQL is: DECODE( expression , search , result [, search , result]... [, default] )
