SQL Server The SQL Server ISNULL() function lets you return an alternative value when an expression is NULL:

This tutorial shows you how to use the Oracle NVL () function to substitute null with a more meaningful alternative.

Appendix C in Oracle Database Globalization Support Guide for the collation derivation rules, which define the collation assigned to the return value of NVL when it is a character value

Jun 8, 2022 · With this syntax, we can provide any number of arguments, and NVL() will return the first non-NULL value. This syntax makes NVL() a synonym for COALESCE() (which returns the first non …

This Oracle tutorial explains how to use the Oracle / PLSQL NVL function with syntax and examples. The Oracle / PLSQL NVL function lets you substitute a value when a null value is encountered.

Aug 8, 2024 · SQL general functions are built-in functions provided by SQL databases to perform various operations on data. These functions are categorized into several types based on their …

Dec 9, 2024 · Handling NULL values effectively is a common challenge in SQL. Functions like NVL, NVL2, COALESCE, and NULLIF offer powerful ways to manage NULL values and conditionally …

NVL stands for "null value logic" and is used primarily to provide more meaningful data when NULL values are encountered in query results. You would use the SQL NVL function when you want to …

May 3, 2025 · The NVL function in SQL replaces NULL values with a default. Learn how to use it, understand the syntax, and see how it compares to COALESCE for SQL queries.

NVL helps you avoid NULL values in query results by replacing them with alternative values, such as zero, an empty string, or any other meaningful default. The basic syntax of the NVL function is: sql. …