A user-defined function is stored as a database object providing reusable code that can be used in these ways: In Transact-SQL statements such as SELECT In applications calling the function In the definition of another user-defined function To parameterize a view or improve the functionality...
The declaration of a user-defined function provides:Function name Function schema (parameters it accepts, if any) Function body备注 Overloading functions isn't supported. You can't create multiple functions with the same name and different input schemas....
UserDefinedFunction 类型公开以下成员。 构造函数 展开表 名称说明 UserDefinedFunction() () () () 初始化 UserDefinedFunction 类的新实例。 UserDefinedFunction(Database, String) 在指定的数据库上使用指定名称初始化 UserDefinedFunction 类的新实例。 UserDefinedFunction(Database, String, String) 在指定的...
User-defined table-valued functions (TVFs) return a table data type. For an inline table-valued function, there's no function body; the table is the result set of a single SELECT statement. For examples, see Create user-defined functions (database engine)....
Components of a Table-Valued User-defined Function In a table-valued user-defined function: The RETURNS clause defines a local return variable name for the table returned by the function. The RETURNS clause also defines the format of the table. The scope of the local return variable name is ...
Fluent中的Lee相变模型是一种用于模拟固-液-气三相物质相变过程的模型。该模型是在Fluent软件中实现的一种User-Defined Function (UDF),可以计算物质在相变过程中的温度、压力、流量等。 Lee相变模型基于基于普朗特理论,将相变过程分为两个独立的过程:一是液相内部的蒸汽-液相转变;二是蒸汽相内部的气相-蒸汽相转变。
Inline User-defined Function Rules Inline user-defined functions follow these rules: The RETURNS clause contains only the keyword table. You do not have to define the format of a return variable, because it is set by the format of the result set of the SELECT statement in the RETURN clause...
CreateCreates a user-defined function on the instance of SQL Server as defined by theUserDefinedFunctionobject. Deny(ObjectPermissionSet, String)Denies the specified set of permissions for the specified grantee on the user-defined function.
function_name 指定用户自定义函数的名称。database_name.owner_name.function_name 应是惟一的。 @parameter_name 定义一个或多个参数的名称。一个函数最多可以定义1024 个参数每个参数前用“@”符号标明。参数的作用范围是整个函数。参数只能替代常量,不能替代表名、列名或其它数据库对象的名称。用户自定义函数不支...
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...