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 AI检测代码解析 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...
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_...
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...
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 ...
Works in:SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse More Examples Example Compare two expressions: SELECTNULLIF('Hello','Hello'); Try it Yourself » Example Compare two expressions: ...
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...
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 3124 <123>
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...
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...
常用sql查询语句记录 腾讯技术创作特训营S7 要按月统计每月的订单数量,您可以使用MySQL中的日期函数和聚合函数。假设您有一个名为"orders"的表,其中包含订单信息,并且有一个名为"order_date"的列,其中包含订单的日期。 言程序 2024/06/17 2280 MySql常用函数(逻辑判断,字符串处理,日期函数)FIND_IN_SET、IF、IS...