There are several functions in SQL, such as NVL and ISNULL, that perform some kind of logic on the values that are provided. Learn what they all do and see some examples in this article. Get All Of My SQL Cheat Sheets Get The Cheat Sheets SQL Logical Functions in This Guide In this ...
This SQL statement would return thesupplier_namefield if thesupplier_desccontained a null value. Otherwise, it would return thesupplier_desc. A final example using the NVL function in Oracle/PLSQL is: SELECT NVL(commission, 0) FROM sales; This SQL statement would return 0 if thecommissionfield...
如果表达式A为空值，NVL返回值为表达式B的值，否则返回表达式A的值。该函数的目的是把一个空值（null）...
SQL 通用函数| NVL、NVL2、DECODE、jocket、NULLIF、LNNVL 和 NANVL 原文:https://www . geesforgeks . org/SQL-general-functions-nvl-nvl 2-decode-join-null if-lnnvl-nanvl/ 在本文中,我们将讨论一些强大的 SQL 通用函数,它们是——NVL 函数、NVL2 函数 开发文档
Example of DECODE and NVL functions Based on the Oracle SQL query shown in the diagram, here is the extracted SQL code and the result set: SQL Query: SELECT STATE, DECODE(STATE, 'HI', 'Remote US state', 'AK', 'Continental US state', 'Contiguous US state') LOCATION FROM CUSTOMER; ...
Databricks SQL Databricks Runtime 如果expr2为expr1,则返回NULL;否则返回expr1。 此函数是带有两个参数的coalesce(expr1, expr2)的同义函数。 语法 nvl(expr1, expr2) 参数 expr1:任何类型的表达式。 expr2:一个与共享expr1的表达式。 返回 结果类型是参数类型中的最不常见类型。
SQL Server The SQL ServerISNULL()function lets you return an alternative value when an expression is NULL: SELECTProductName, UnitPrice * (UnitsInStock + ISNULL(UnitsOnOrder,0)) FROMProducts; or we can use theCOALESCE()function, like this: ...
In Oracle, NVL(exp1, exp2) function accepts 2 expressions (parameters), and returns the first expression if it is not NULL, otherwise NVL returns the second expression. In SQL Server, you can use ISNULL(exp1, exp2) function. Oracle Example: -- Ret
SQL Fundamentals || Single-Row Functions || 通用函数 General function Oracle自己提供的有特色的函数; NVL()和DECODE()是通用函数的基础函数,其他函数都在此函数之上进行功能扩充。 函数名称 描述 NVL(数字 | 列 , 默认值) 如果显示的数字是null的话,则使用默认数值表示 ...
This is a guide to Oracle NVL(). Here we discuss the introduction, how NVL() function work in oracle? and examples respectively. You may also have a look at the following articles to learn more – Oracle While Loop Oracle Window Functions ...