How do you write a WHILE LOOP in MySQL?

How do you write a WHILE LOOP in MySQL?


  1. Introduction :
  2. Syntax : [label_name:] WHILE condition DO statements_list END WHILE [label_name]
  3. Syntax label meaning –
  4. Block diagram of While loop :
  5. Example-1 :
  6. Analysis –
  7. Output – 0, 10000, 20000, 30000.
  8. Example-2 :

How do I loop a MySQL query?

Loops in MySQL

  1. Syntax :
  2. Parameters –
  3. Example-1 : DROP PROCEDURE IF EXISTS GeekLoop(); DELIMITER $$ CREATE PROCEDURE GeekLoop() BEGIN DECLARE no INT; SET no = 0; loop: LOOP SET no = no +1; select no ; IF no =5 THEN LEAVE loop; END IF; END LOOP loop; SELECT no; END $$ DELIMITER ;
  4. Output – 0, 1, 2, 3, 4, 5.

How do you loop a SQL query?


  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.

Do WHILE LOOP in SQL query?

A while loop will check the condition first and then executes the block of Sql Statements within it as along as the condition evaluates to true. Example: Basic while loop example. The below while loop executes the statements within it 4 times.

How do you use a WHILE LOOP in a query?

SQL While loop syntax The while loop in SQL begins with the WHILE keyword followed by the condition which returns a Boolean value i.e. True or False. The body of the while loop keeps executing unless the condition returns false. The body of a while loop in SQL starts with a BEGIN block and ends with an END block.

Can we use loop in SQL?

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

What is procedure in MySQL?

A procedure is a subroutine (like a subprogram) in a regular scripting language, stored in a database. In the case of MySQL, procedures are written in MySQL and stored in the MySQL database/server. A MySQL procedure has a name, a parameter list, and SQL statement(s).

What is Loop in MySQL?

Introduction to MySQL LOOP statement The LOOP executes the statement_list repeatedly. The statement_list may have one or more statements, each terminated by a semicolon (;) statement delimiter. Typically, you terminate the loop when a condition is satisfied by using the LEAVE statement.

Can we use for loop in MySQL query?

FOR loop syntax example in MySQL: It used to work in prior versions. I think it’s the end of line delimiter to change: use the command delimiter // before running this.

Can you write loops in SQL?

In programming, a loop allows you to write a set of code that will run repeatedly within the same program. Many programming languages have several different types of loop to choose from, but in SQL Server there is only one: the WHILE loop.

What is the correct syntax for a while loop?

– for loop – while loop – do-while

How to execute a while loop?

while command do Statement (s) to be executed if command is true done Here the Shell command is evaluated. If the resulting value is true, given statement (s) are executed. If command is false then no statement will be executed and the program will jump to the next line after the done statement.

Why is my while loop only looping once?

The initial value of the for loop is performed only once.

  • The condition is a Boolean expression that tests and compares the counter to a fixed value after each iteration,stopping the for loop when false is returned.
  • The incrementation/decrementation increases (or decreases) the counter by a set value.
  • How to exit from a while loop?

    #Stop a loop early with C#’s break statement. When we execute the break statement inside a loop,it immediately ends that particular loop (Sharp,2013).

  • #Exit a loop with C#’s goto statement.
  • #End a loop with C#’s return statement.
  • #Stop a loop early with C#s throw statement.