Oracle: How to call a function from the SQL*Plus command line

If you would like to verify the result of a function call in Oracle SQL*Plus you could simply include it in a SQL select statement like this:

  1. CREATE OR REPLACE FUNCTION testfunction(testparm IN NUMBER)
  2.   RETURN(testparm);
  3. END testfunction;
SQL> select testfunction(123) from dual;
 
TESTFUNCTION(123)
-----------------
              123
 
SQL> 

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