User-defined functions can't make use of dynamic SQL or temp tables. Table variables are allowed. SET statements aren't allowed in a user-defined function. The FOR XML clause isn't allowed.

A user-defined function is a mechanism with which you can write your own extensions to SQL. The built-in functions supplied with DB2 are a useful set of functions, but they may not satisfy all of your ...

(Collation is specified either in the DDL for the table-valued function, or obtained from the database collation.) sys.sql_modules See example E in the Examples section. sys.assembly_modules Displays ...

Now you can extract and parameterize your action logic and reuse it throughout your app, having only one source of truth for that logic that is easier to maintain. For more information and examples, ...

Although this falls naturally within the scope of relational databases, many such tasks cannot be expressed in SQL and require additional expressive power achieved via user-defined functions (UDFs).

Abstract: With the continuous evolution of database technology, numerous databases and query analysis engines have begun to incorporate user-defined functions into SQL. These functions enable users to ...