語法
創建語法如下：
CREATE FUNCTION [ owner_name.] function_name
( [ { @parameter_name [AS] scalar_parameter_data_type [ = default ] } [ ,...n ] ] )
RETURNS @return_variable TABLE < table_type_definition >
[ WITH < function_option > [ [,] ...n ] ]
[ AS ]
BEGIN
function_body
RETURN
END
< function_option > ::=
{ ENCRYPTION | SCHEMABINDING }
< table_type_definition > ::=
( { column_definition | table_constraint } [ ,...n ] )
