How to use Variable Scope in PL/SQL In SQL
In PL/SQL variable scope can be a local or global. Declaring variable within a block or subprogram are only accessible within that block or subprogram and Declaring variable in the outermost block are accessible to nested blocks and subprograms.
DECLARE
global_var NUMBER; -- global variable
BEGIN
-- PL/SQL code using global_var
DECLARE
local_var NUMBER; -- local variable
BEGIN
-- PL/SQL code using local_var and global_var
END;
-- Here you can't access local_var
END;
How to Declare a Variable in PL/SQL?
Declaring variables in PL/SQL is a fundamental step towards building powerful and efficient database applications. Variables act as placeholders for data which enable us to manipulate and store information within our PL/SQL programs.
Understanding how to declare variables is essential for writing effective and scalable code. In this article, we will learn about how to declare a variable with the help of various methods along with the syntax and examples.
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