How to write loop statement in oracle

There are three types of loop statements in Oracle. The syntax is: FOR loop: FOR loop_variable IN [start_value, end_value] LOOP statement(s);END LOOP;WHILE loop: WHILE condition LOOP statement(s);END LOOP ;DO WHILE loop: DO statement(s);WHILE condition;END;

##Loop statements in Oracle

Loop statements in Oracle are used to repeatedly execute a set of statements until a specific condition is met. It can be used to process large amounts of data or perform the same tasks repeatedly.

Syntax

There are three main loop statements in Oracle:

• FOR loop: Traverse a sequence in order Series value.
• WHILE loop: Continue execution until the conditions are met.
• DO WHILE loop: First execute a set of statements, and then check the condition.

FOR Loop

<code class="sql">FOR loop_variable IN [start_value, end_value] LOOP
  statement(s);
END LOOP;</code>

For example:

<code class="sql">FOR i IN 1..10 LOOP
  dbms_output.put_line('i = ' || i);
END LOOP;</code>

This will print "i = 1" to "i = 10" in the console .

WHILE loop

<code class="sql">WHILE condition LOOP
  statement(s);
END LOOP;</code>

For example:

<code class="sql">DECLARE
  i NUMBER := 1;
BEGIN
  WHILE i <= 10 LOOP
    dbms_output.put_line('i = ' || i);
    i := i + 1;
  END LOOP;
END;</code>

DO WHILE loop

<code class="sql">DO
  statement(s);
WHILE condition;
END;</code>

For example:

<code class="sql">DECLARE
  i NUMBER := 1;
BEGIN
  DO
    dbms_output.put_line('i = ' || i);
    i := i + 1;
  WHILE i <= 10;
END;</code>

It should be noted that the WHILE and DO WHILE loops must include statements that modify the loop variables to ultimately meet the conditions. Otherwise, the loop will execute indefinitely.

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