A SQL Server object that dynamically loads and executes a function within a dynamic-link library (DLL) in a manner similar to a stored procedure. Actions outside SQL Server can be triggered, and external information returned to SQL Server. SQL Server comes pre-installed with a large number of extended stored procedures. In addition, SQL Server includes system-stored procedures that allow adding and dropping extended stored procedures, or provide information about such procedures.
An external procedure, also sometimes referred to as an external routine, is a procedure stored in a dynamic link library (DLL) on Windows platform or shared library under UNIX. The external procedure is registered with the base language, and then invoked to perform special-purpose processing.
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