How do you write a loop in SQL query?

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.

What is looping statement in SQL?

The LOOP statement is a special type of looping statement, because it has no terminating condition clause. It defines a series of statements that are executed repeatedly until another piece of logic, generally a transfer of control statement, forces the flow of control to jump to some point outside of the loop.

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 loop query?

The Query Loop block is an advanced block that allows you to display posts based on specified parameters; like a PHP loop without the code. You can think of it as a more complex and powerful Latest Posts Block.

How do you write a while loop in SQL?

The following syntax illustrates the WHILE loop in SQL Server:

  1. WHILE boolean_condition.
  2. BEGIN.
  3. {SQL_statement | statement_block | BREAK | CONTINUE}
  4. END;

What is a query loop block?

The Query Loop block allows you to display posts based on parameters you specify. This block is similar to the Latest Posts Block, but with greater complexity and flexibility, allowing you to create things like a portfolio of projects or a page full of your favorite recipe posts.

How do you create a loop in SQL Server?

I am detailing answer on ways to achieve different types of loops in SQL server.

  1. FOR Loop. DECLARE @cnt INT = 0; WHILE @cnt < 10 BEGIN PRINT ‘Inside FOR LOOP’; SET @cnt = @cnt + 1; END; PRINT ‘Done FOR LOOP’;
  2. DO.. WHILE Loop.
  3. REPEAT..UNTIL Loop.

Do While loop in SQL Server?

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.

What is cursor in SQL?

A cursor holds the rows (one or more) returned by a SQL statement. The set of rows the cursor holds is referred to as the active set. You can name a cursor so that it could be referred to in a program to fetch and process the rows returned by the SQL statement, one at a time.