在SQL Server 2000 中根据函数返回值形式的不同将用户自定义函数分为三种类型: 标量型函数(Scalar functions) 标量型函数返回一个确定类型的标量值其返回值类型为除TEXT、 NTEXT、 IMAGE、CURSOR、 TIMESTAMP 和TABLE 类型外的其它数据类型。函数体语句定义在BEGIN-END语句内,其中包含了可以返回值的Transact-SQL 命令。
自定义函数(User-Defined Function)有两种,一种是标量UDF(Scalar-valued Functions)和表值UDF(Table-valued Functions),前者只返回单个数据值,而后者则返回一个表。下面示例是,是属于前者,返回单个值。 代码
标量函数(Scalar Functions):返回单个值,通常用于计算操作。 表值函数(Table-Valued Functions):返回一个表,可以用作 SELECT 语句中的数据源。 二、查看现有函数 在SQL Server 中,我们可以使用以下几种方法查看现有函数的定义和详细信息: 使用SQL Server Management Studio (SSMS) 使用系统视图 查询系统存储过程 接下...
You can use ODBC Scalar Functions in Transact-SQL statements. These statements are interpreted by SQL Server. They can be used in stored procedures and user-defined functions. These include string, numeric, time, date, interval, and system functions....
SQL SERVER中的用户定义函数(User Defined Functions 简称UDF)分为标量函数(Scalar-Valued Function)和表值函数(Table-Valued Function)。其中表值函数又分为Inline table-valued functions和Multistatement table-valued functions。 用户定义函数(UDF)在 SQL Server 中发挥重要的作用。用户定义函数可以用于执行复杂的逻辑...
You can useODBC Scalar Functionsin Transact-SQL statements. These statements are interpreted by SQL Server. They can be used in stored procedures and user-defined functions. These include string, numeric, time, date, interval, and system functions. ...
A scalar-valued function returns a single value. In SQL Server CLR integration, you can write scalar-valued user-defined functions in managed code.
EXECUTE AS is required for natively compiled, scalar user-defined functions. <function_option> ::= and <clr_function_option> ::= Specifies that the function has one or more of the following options. ENCRYPTION Applies to: SQL Server 2008 (10.0.x) SP 1 and later versions. Indicates that ...
SQL Server Scalar UDF inline hi, here is a demo version of the function and the sample call to it with output -- function used to get value for a key CREATE FUNCTION [dbo].[fn_ForDemo] (@mSettings NVARCHAR(1000), @mKey NVARCHAR(100))...
This CREATE FUNCTION (SQL scalar) statement creates an SQL function at the current server. The function returns a single result.