下面,如果 “UnitsOnOrder” 是 NULL,则不会影响计算,因为如果值是 NULL 则 ISNULL() return 0: SQL Server / MS Access SELECT ProductName,UnitPrice*(UnitsInStock+ISNULL(UnitsOnOrder,0)) FROM Products 1. 2. 3. Oracle Oracle 没有 ISNULL() 函数。不过,咱们可以使用 NVL() 函数达到相同的结果...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft FabricReturns a null value if the two specified expressions are equal. For example, SELECT NULLIF(4,4) AS ...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric Returns a null value if the two specified expressions are equal. For...
l GOTO l WIATFOR 用于暂停执行SQL语句 l WIATFOR DELAY ‘0.0.10’ 暂停指定10秒 l Return语句,和break类型,但return语句可以返回一个整型值 l创建视图 l 可以在企业管理器中直接创建,或者用create view view_name as select * from A,B where =语句创建视图 l 三个关于视图的存储过程: sp_help ; sp_...
SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric Returns a null value if the two specified expressions are equal. For example,SELECT...
Works in: SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data WarehouseMore ExamplesExample Compare two expressions: SELECT NULLIF('Hello', 'Hello'); Try it Yourself » Example Compare two expressions: SELECT NULLIF('Hello', 'world'); Try it ...
SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric Returns a null value if the two specified expressions are equal. For example,SELECT NULLIF(4,4) AS Same, NULLIF...
如果它们的数据类型不同，SQL 会将 replace-expression 转换为 check-expression 的数据类型，然后再进行...
oracle nvl,nvl2,coalesce几个函数的区别 2016-11-03 16:43 −1.nvl(exp1,exp2) NVL lets you replace null (returned as a blank) with a string in the results of a query. If expr1 is null, then ... 费曼带我飞 0 3125 <123>
数据分析sql数据库云数据库 SQL Server编程算法 稍后的MYSQL IFNULL使用此功能的特定叙事,供大家参考学习,假设你MYSQL IFNULL条款的使用功能类别遇到似问题。最好看。 全栈程序员站长 2022/07/05 4420 MySql常用函数(逻辑判断,字符串处理,日期函数)FIND_IN_SET、IF、ISNULL、IFNULL、NULLIF、SUBSTR、SUBSTRING_INDEX...