User-defined functions in SQL Server has a fixed number of parameters. There is no provision to create a function that takes a variable number of parameters. So the best you could do is to create a CREATE_WS which takes, say, six strings plus the separator. But then you need to always...
> CREATE TEMPORARY FUNCTION hello() RETURNS STRING RETURN 'Hello World!'; > SELECT hello(); Hello World! -- Create a permanent function with parameters. > CREATE FUNCTION area(x DOUBLE, y DOUBLE) RETURNS DOUBLE RETURN x * y; -- Use a SQL function in the SELECT clause of...
Applies to:SQL ServerAzure SQL DatabaseAzure SQL Managed Instance Creates a user-defined function (UDF), which is a Transact-SQL or common language runtime (CLR) routine. A user-defined function accepts parameters, performs an action such as a complex calculation, and returns the result of ...
Applies to:SQL ServerAzure SQL DatabaseAzure SQL Managed Instance Creates a user-defined function (UDF), which is a Transact-SQL or common language runtime (CLR) routine. A user-defined function accepts parameters, performs an action such as a complex calculation, and returns the result...
The name, including the implicit or explicit qualifiers, together with the number of parameters and the data type of each parameter (without regard for any length, precision or scale attributes of the data type) must not identify a function described in the catalog (SQLSTATE 42723). The unqual...
function-name Names the user-defined function. The combination of name, schema name, the number of parameters, and the data type of each parameter (without regard for any length, precision, scale, or CCSID attributes of the data type) must not identify a user-defined function that exists at...
Specify a parameter name by using an at sign (@) as the first character. The parameter name must comply with the rules for identifiers. Parameters are local to the function; the same parameter names can be used in other functions. Parameters can take the place only of constants; they canno...
CREATE FUNCTION 定义新函数。CREATE OR REPLACE FUNCTION 将创建新函数,或者替换现有定义。 如果包括 schema 名称,则在指定 schema 中创建函数。否则在当前 schema 中创建。对于任何现有函数,如果与新函数在相同的 schema 中具有相同的输入参数类型,则新函数名称不能与现有函数名称匹配。不过,具有不同输入参数类型的函...
The fifth parameter is an arbitrary pointer. The implementation of the function can gain access to this pointer usingsqlite3_user_data(). The sixth, seventh and eighth parameters, xFunc, xStep and xFinal, are pointers toC-language functionsthat implement the SQL function or aggregate.A scalar...
For datatype, specify the datatype of the return value of the function. Because every function must return a value, this clause is required. The return value can have any datatype supported by PL/SQL. Note: Oracle SQL does not support calling of functions with boolean parameters or returns...