Exec
EXEC (or EXECUTE) runs one of the built-in System Procedures. Parameters are passed in parentheses; the parentheses can be omitted when there are no parameters. Procedure names are not case-sensitive.
User-defined procedures
User-defined stored procedures are not currently available, see Alter Procedure. EXEC with a name that is not a system procedure fails with "Procedure not found".EXEC ShowProcessesEXEC ShowLocks(1)