问题
I have successfully created a function and a trigger but the output does not seem to be showing when i execute it just says procedure completed successfully. It does not display the total cost.
回答1:
To see the output from the DBMS_OUTPUT package, you must enable it. That depends on the tool you are using.
- in SQL+, set the command
set serveroutput onbefore running the procedure - in TOAD, click on the Output On/Off button in the DBMS_OUTPUT tab
- in SQL Developer you also have a tab named DBMS_OUTPUT, click on the the first icon to enable the output
来源：https://stackoverflow.com/questions/20226210/output-message-problems-with-procedure-and-function