Single-Line Comments
A Single line comment starts with the (–) double hyphen. It will affect the whole line (till end of line). We don’t need to specify the end.
Syntax of Single-Line PL/SQL Comment
-- This is a single line comment
Example 01: PL/SQL Program to illustrate Single-Line Comment
-- Here is a program for addition of two numbers in PL/SQL
DELIMITER //
CREATE PROCEDURE add_two_numbers()
BEGIN
-- Declare variables a, b, and c of datatype INT
DECLARE a INT;
DECLARE b INT;
DECLARE c INT;
-- Assign value to variable a
SET a := 10;
-- Assign value to variable b
SET b := 20;
-- Performing addition of a and b and storing it into c
SET c := a + b;
-- Printing the result
SELECT CONCAT('Sum is ', c) AS result;
END //
DELIMITER ;
Output:Output after executing procedure
Output after executing procedure
Explanation: As we can see after calling the procedure named add_two_numbers, all the comments are ignored by the compiler and the result of addition is returned.
PL/SQL Comments
PL/SQL is a Procedural Language for SQL language that extends the functionality of the SQL within Oracle Database Management System. Comments can be used to make code more human-readable. It is a kind of note that programmers usually add while writing the code. In this article, We will learn about Comments in detail along with the types and benefits of using Comments.
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