The CREATE FUNCTION (SQL scalar, table, or row) statement is used to define a user-defined SQL scalar, table, or row function. A scalar function returns a single value each time it is invoked, and is generally valid wherever an SQL expression is valid. A table function can be used in...
Creates a SQL scalar or table function that takes a set of arguments and returns a scalar value or a set of rows.Applies to: Databricks SQL Databricks Runtime 13.3 LTS and aboveCreates a Python scalar function that takes a set of arguments and returns a scalar value....
SQL 複製 -- Replace a SQL scalar function. > CREATE OR REPLACE FUNCTION square(x DOUBLE) RETURNS DOUBLE RETURN x * x; -- Replace a SQL table function. > CREATE OR REPLACE FUNCTION getemps(deptno INT) RETURNS TABLE (name STRING) RETURN SELECT name FROM employee e WHERE e...
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 [ ...
This CREATE FUNCTION (external scalar) statement defines an external scalar function at the current server. A user-defined external scalar function returns a single value each time it is invoked. Invocation This statement can be embedded in an application program, or issued interactively. It is an...
您可以利用ALTER FUNCTION來修改使用者自訂函數,並利用DROP FUNCTION來卸除使用者自訂函數。 Transact-SQL 語法慣例 語法 複製 Scalar Functions CREATE FUNCTION [ schema_name. ] function_name ( [ { @parameter_name [ AS ][ type_schema_name. ] parameter_data_type [ = default ] } [ ,...n ] ] ...
在标量函数中,function_body是一系列Transact-SQL语句,这些语句一起使用的计算结果为标量值。 在多语句表值函数中,function_body是一系列Transact-SQL语句,这些语句将填充TABLE返回变量。 scalar_expression 指定标量函数返回的标量值。 TABLE 指定表值函数的返回值为表。只有常量和@local_variables可以传递到表值函数。
用户定义函数用 ALTER FUNCTION 修改，用 DROP FUNCTION 除去。 语法 标量函数 CREATE FUNCTION [ owner_name.] function_name ( [ { @parameter_name [AS] scalar_parameter_data_type [ = default ] } [ ,...n ] ] ) RETURNS scalar_return_data_type [ WITH < function_option> [ [,] ...n] ]...
Only a constant value, such as a character string; a scalar function (either a system, user-defined, or CLR function); or NULL can be used as a default. To maintain compatibility with earlier versions of SQL Server, a constraint name can be assigned to a DEFAULT. constant_expression A ...
Scalar Functions CREATE FUNCTION [ schema_name. ] function_name ( [ { @parameter_name [ AS ][ type_schema_name. ] parameter_data_type [ = default ] } [ ,...n ] ] ) RETURNS return_data_type [ WITH <function_option> [ ,...n ] ] [ AS ] BEGIN function_body RETURN scalar_expr...