Can we use for loop in Oracle?

In Oracle, the FOR LOOP allows you to execute code repeatedly for a fixed number of times.

How do I run a for loop in Oracle?

Syntax

  1. The initial step is executed first, and only once. This step allows you to declare and initialize any loop control variables.
  2. Next, the condition, i.e., initial_value ..
  3. After the body of the for loop executes, the value of the counter variable is increased or decreased.
  4. The condition is now evaluated again.

How do you write a for loop in PL SQL?

PL/SQL For Loop Example 2

  1. DECLARE.
  2. VAR1 NUMBER;
  3. BEGIN.
  4. VAR1:=10;
  5. FOR VAR2 IN 1..10.
  6. LOOP.
  7. DBMS_OUTPUT.PUT_LINE (VAR1*VAR2);
  8. END LOOP;

How do I run a SQL query in a for loop?

Running a Query Inside the Loop

  1. WHILE @Counter <= @MaxOscars.
  2. BEGIN.
  3. SET @NumFilms =
  4. SELECT COUNT(*)
  5. FROM tblFilm.
  6. WHERE FilmOscarWins = @Counter.
  7. SET @Counter += 1.
  8. END.

Can we use for loop in SQL query?

There is no FOR in SQL, But you can use WHILE or GOTO to achieve the way how the FOR will work. I always prefer WHILE over GOTO statement. For loop is not officially supported yet by SQL server.

How do I create a loop in Oracle SQL query?

Loop Control Statements

  1. CONTINUE. This keyword sends an instruction to the PL/SQL engine that whenever PL/SQL engine encounters this keyword inside the loop, then it will skip the remaining code in the execution block of the code, and next iteration will start immediately.
  2. EXIT / EXIT WHEN.
  3. GOTO.

Does SQL have for loops?

In SQL Server, there is no FOR LOOP. However, you simulate the FOR LOOP using the WHILE LOOP.

What are 3 types of loops in SQL?

Controlling Loop Iterations: LOOP and EXIT Statements. LOOP statements execute a sequence of statements multiple times. There are three forms of LOOP statements: LOOP , WHILE-LOOP , and FOR-LOOP . For a description of the syntax of the LOOP statement, see “LOOP Statements”.

What are Oracle loops?

Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body. 3. PL/SQL FOR LOOP. Execute a sequence of statements multiple times and abbreviates the code that manages the loop variable.

How many types of loops are there in Oracle?

There are 4 types of PL/SQL Loops.

What are loop statements?

A loop statement is a series of steps or sequence of statements executed repeatedly zero or more times satisfying the given condition is satisfied. Loop statements in programming languages, such as assembly languages or PERL make use of LABEL’s to execute the statement repeatedly.

Which is an example of a for loop in Oracle?

Example. Let’s look at an example of how to use a FOR LOOP in Oracle. FOR Lcntr IN 1..20 LOOP LCalc := Lcntr * 31; END LOOP; This FOR LOOP example will loop 20 times. The counter called Lcntr will start at 1 and end at 20. You can use the REVERSE modifier to run the FOR LOOP in reverse order. For example:

Is there a way to exit a loop in Oracle?

In Oracle there is a similar statement called EXIT that either exits a loop or a function/procedure (if there is no loop to exit from). You can add a WHEN to check for some condition. This may not be enough if you want to exit from deep down some nested loops and logic, but is a lot clearer than a couple of GOTOs and NULLs.

How does the for loop statement in PL / SQL work?

PL/SQL FOR LOOP executes a sequence of statements a specified number of times. The PL/SQL FOR LOOP statement has the following structure: FOR index IN lower_bound .. upper_bound LOOP statements; END LOOP ; The index is an implicit variable. It is local to the FOR LOOP statement. In other words, you cannot reference it outside the loop.

When does a statement in a for loop end?

With each iteration of the FOR LOOP statement, its statements run, its index is either incremented or decremented, and control returns to the top of the loop. The FOR LOOP statement ends when its index reaches a specified value, or when a statement inside the loop transfers control outside the loop or raises an exception. See ” statement ::=”.

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