Αποτελέσματα Αναζήτησης
The Oracle DECODE() function allows you to add the procedural if-then-else logic to the query. In the following example, the Oracle DECODE() function compares the first argument (1) with the second argument (1).
- Oracle Coalesce Function
Summary: in this tutorial, you will learn how to use the...
- Oracle Coalesce Function
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.
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.
DECODE compares expr to each search value one by one. If expr is equal to a search, then Oracle Database returns the corresponding result. If no match is found, then Oracle returns default. If default is omitted, then Oracle returns null.
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 compact syntax, making it a popular choice for simplifying complex queries and improving code readability.
Syntax: decode ( expression , compare_value, return_value, [,compare, return_value] ... [,default_return_value] ) with: expression is the value to evaluate. compare_value is the value that can match the evaluated value. return_value is the value that is returned if compare_value equals the value.
Oracle DECODE() is a built-in function that decodes a given parameter based on one or more given mapping relationships and returns the decoded value.
