To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) var2 NUMBER := 0; - This line is correct. It declares a variable var2
of type NUMBER
and initializes it with a value of 0. There is no error in this line.
Option B) INTO var2 - This line is correct. It is part of the SELECT
statement and specifies that the result of the SELECT
query should be stored in the variable var2
. There is no error in this line.
Option C) WHERE name = 'JORDAN'; - This line is correct. It is part of the SELECT
statement and specifies the condition for the WHERE
clause. It filters the rows based on the value of the name
column equal to 'JORDAN'. There is no error in this line.
Option D) var1 :=var2 + 2000; - This line will produce an error. The variable var1
is declared as a constant using the CONSTANT
keyword. Constants cannot be assigned new values once they are declared. Therefore, trying to assign a new value to var1
will result in an error.
Option E) There are no errors in this PL/SQL block - This option is incorrect. As explained above, the line var1 :=var2 + 2000;
will produce an error. Therefore, there is an error in this PL/SQL block.
The correct answer is D. This line (var1 :=var2 + 2000;
) will produce an error because var1
is declared as a constant and cannot be assigned a new value.