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How do you loop a procedure in MySQL?

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How do you loop a procedure in MySQL?

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 procedure?

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.

Can you write a loop in MySQL?

Introduction to MySQL LOOP statement The LOOP statement allows you to execute one or more statements repeatedly. The LOOP can have optional labels at the beginning and end of the block. The statement_list may have one or more statements, each terminated by a semicolon (;) statement delimiter.

Can we use loop in stored procedure?

SQL Server stored procedure for loop SQL Server does not support FOR loop. However, you can use the WHILE loop to perform the same task.

How do you execute a loop in SQL?

DECLARE @cnt INT = 0; WHILE @cnt < 10 BEGIN PRINT ‘Inside FOR LOOP’; SET @cnt = @cnt + 1; END; PRINT ‘Done FOR LOOP’; If you know, you need to complete first iteration of loop anyway, then you can try DO.. WHILE or REPEAT..

How do I create a cursor in MySQL?

  1. Declaration of a Cursor. To declare a cursor you must use the DECLARE statement.
  2. Open a Cursor. For opening a cursor we must use the open statement.
  3. Fetch the Cursor. When we have to retrieve the next row from the cursor and move the cursor to the next row then you need to fetch the cursor.
  4. Close the Cursor.

How do you create a loop in SQL?

The Basic Syntax of a WHILE Loop

  1. –This variable keeps track of how many times the loop has run.
  2. DECLARE @Counter INT.
  3. SET @Counter = 0.
  4. –The loop begins by checking a condition is met.
  5. –Here we check that the counter has not exceeded 10.
  6. WHILE @Counter <= 10.
  7. –When the condition is met, the loop is entered.

How do I create a while LOOP in MySQL?

Introduction to MySQL WHILE loop statement In this syntax: First, specify a search condition after the WHILE keyword. The WHILE checks the search_condition at the beginning of each iteration. If the search_condition evaluates to TRUE , the WHILE executes the statement_list as long as the search_condition is TRUE .

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 to use loop_label in a stored procedure?

In this example: 1 The stored procedure constructs a string from the even numbers e.g., 2, 4, and 6. 2 The loop_label before the LOOP statement for using with the ITERATE and LEAVE statements. 3 If the value of x is greater than 10, the loop is terminated because of the LEAVE statement.

What is loops in MySQL?

Loops in MySQL 1 labelname : It is an optional label at the start and end. 2 statements : They could have one or multiple statements, each ended by a semicolon (;) and executed by LOOP. More

How do you execute a while loop in SQL?

Firstly, the WHILE loop execution is started, for each loop iterations, the condition defined is evaluated, then based on the result of WHILE condition the SQL statement is determined. When the WHILE loop results in TRUE then, the code flow statements will be executed.

What is a stored procedure in SQL?

Stored procedures are sub routines, segment of SQL statements which are stored in SQL catalog. These procedures contain IN and OUT parameters, or both. They may return result sets in case you use SELECT statements; they can return multiple result-sets.

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