To run the given function CALCTAX
from the SQL *Plus prompt, you need to create a SQL *Plus environment variable X
and issue the command EXECUTE :X := CALCTAX(1000);
.
Let's go through each option to understand why it is correct or incorrect:
Option A) You need to execute the command CALCTAX(1000);
- This option is incorrect because executing the function directly without assigning the result to a variable will not give you the desired output.
Option B) You need to execute the command EXECUTE FUNCTION calc tax;
- This option is incorrect because the syntax of the EXECUTE
command is incorrect. It should be EXECUTE ();
.
Option C) You need to create a SQL *Plus environment variable X
and issue the command :X := CALCTAX(1000);
- This option is incorrect because the syntax of assigning a value to the variable X
is incorrect. It should be X := ;
instead of :X := ;
.
Option D) You need to create a SQL *Plus environment variable X
and issue the command EXECUTE :X := CALCTAX;
- This option is incorrect because the function CALCTAX
requires an input argument sal
, which is missing in the EXECUTE
command.
Option E) You need to create a SQL *Plus environment variable X
and issue the command EXECUTE :X := CALCTAX(1000);
- This option is correct because it correctly creates a SQL *Plus environment variable X
and assigns the result of the function CALCTAX(1000)
to X
using the EXECUTE
command.
The correct answer is option E.