Scalar function examples Table-valued function examples Show 2 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) This article describes how to create a user-defined function (UDF) in SQL Server by ...
Scalar function examples Table-valued function examples Show 2 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) This article describes how to create a user-defined function (UDF) in SQL Server by using Transact-SQL....
Scalar SQL function example PDF RSS Focus mode The following example creates a function that compares two numbers and returns the larger value. For more information, see CREATE FUNCTION.create function f_sql_greater (float, float) returns float stable as $$ select case when $1 > $2 then $...
Syntax for Transact-SQL scalar functions. syntaxsql 复制 CREATE [ OR ALTER ] FUNCTION [ schema_name. ] function_name ( [ { @parameter_name [ AS ] [ type_schema_name. ] parameter_data_type [ NULL ] [ = default ] [ READONLY ] } [ , ...n ] ] ) RETURNS return_data_type [ ...
Syntax for Transact-SQL scalar functions. syntaxsql 複製 CREATE [ OR ALTER ] FUNCTION [ schema_name. ] function_name ( [ { @parameter_name [ AS ] [ type_schema_name. ] parameter_data_type [ NULL ] [ = default ] [ READONLY ] } [ , ...n ] ] ) RETURNS return_data_type [ ...
sql server 函数的自定义 用户定义函数可使用ALTER FUNCTION修改,使用DROP FUNCTION删除。 Transact-SQL 语法约定 Scalar Functions CREATE FUNCTION [ schema_name. ] function_name ( [ { @parameter_name [ AS ][ type_schema_name. ] parameter_data_type...
在純量函式中,function_body 是一系列的 Transact-SQL 陳述式,這些陳述式會一起評估為純量值。在MSTVF 中, function_body 是一系列的 Transact-SQL 語句,可填入 TABLE 傳回變數。scalar_expression指定純量函數傳回的純量值。TABLE指定資料表值函式 (TVF) 的傳回值是資料表。 只有常數和 @...
This CREATE FUNCTION (SQL scalar) statement creates an SQL function at the current server. The function returns a single result. Invocation This statement can be embedded in an application program or issued interactively. It is an executable statement that can be dynamically prepared. ...
Because the scalar function must be applied to every row, the resulting behavior is like row-based processing and degrades performance. Avoid the use of SELECT *. Instead, specify the required column names. This can prevent some Database Engine errors that stop procedure execution. For example,...
Syntax for Transact-SQL scalar functions. syntaxsql Copy CREATE [ OR ALTER ] FUNCTION [ schema_name. ] function_name ( [ { @parameter_name [ AS ] [ type_schema_name. ] parameter_data_type [ NULL ] [ = default ] [ READONLY ] } [ , ...n ] ] ) RETURNS return_data_type [ ...