User-defined scalar functions return a single data value of the type defined in the RETURNS clause. For an inline scalar function, the returned scalar value is the result of a single statement. For a multistatement scalar function, the function body can contain a series of Transact-SQL stateme...
UserDefinedFunction 事件 UserDefinedFunction 型別公開下列成員。 事件 展開資料表 名稱說明 PropertyChanged 代表屬性變更時所發生的事件。 (繼承自 SqlSmoObject。) PropertyMetadataChanged 代表屬性中繼資料變更時所發生的事件。 (繼承自 SqlSmoObject。) 上層 請參閱 參考 UserDefinedFunction 類別 Microsoft....
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,...
为什么会有这种情况,这是因为SQL语句里面调用用户定义标量函数(UDF Scalar Function),都是逐行调用用户定义函数,这样需要为每行去提取用户定义函数的定义,然后去执行这些定义,从而导致了性能问题;更深层次的原因是因为函数采用了过程式的处理方法,而SQL Server查询数据则是基于数据集合的,这样在采用过程式的逐行处理时,S...
GetServerObjectGets the server of theSqlSmoObjectobject. (繼承自SqlSmoObject。) GetType(繼承自Object。) Grant(ObjectPermissionSet, String)Grants the specified set of permissions to the specified grantee on the user-defined function. Grant(ObjectPermissionSet, array<String[])Grants the specified set ...
在数据库对象“User Defined Functions” 上单击右键,从开始菜单中选择“New User Defined Function” 选项,就会出现如图13-4 所示的定义用户自定义函数属性对话框。可以在其中指定要定义的函数的名称,并编辑函数的脚本。单击“OK”按钮,则添加用户自定义函数对象到数据库中。
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User-defined functions written in either Transact-SQL or .NET Framework can return both scalar and table values. Properties of Functions There are several properties of user-defined functions that determine the ability of the SQL Server Database Engine to index the results of the function, either...
This topic describes how to create a Transact-SQL user-defined function in SQL Server 2012 by using Transact-SQL. In This Topic Before you begin: Limitations and Restrictions Security To create a user-defined function: Create a Scalar Function ...
User-defined functions written in either Transact-SQL or .NET Framework can return both scalar and table values. Properties of Functions There are several properties of user-defined functions that determine the ability of the SQL Server Database Engine to index the results of the function, either...