How do you write a while loop in SQL?

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.

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What is Do While loop in SQL with example?

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 does while loop work in Oracle?

The WHILE loop syntax PL/SQL evaluates the condition in the WHILE clause before each loop iteration. If the condition is TRUE , then the loop body executes. In case it is FALSE or NULL , the loop terminates. If the condition is FALSE before entering the loop, the WHILE loop does not execute at all.

Can you loop in Oracle SQL?

So, while Oracle SQL does not directly support while loops of for loops, there is extended syntax for looping within some stored procedures that are embedded into Oracle SQL.

How do you write a loop in SQL query?

The Basic Syntax of a WHILE Loop

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

Can we write for loop in SQL?

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

Can we use loops in SQL?

SQL Server implements the WHILE loop allowing us to repeat a certain code while the loop condition holds. If, for any reason, we need other loops, we can simulate them using a WHILE loop. We’ll show this later in the article. Loops are rarely used, and queries do most of the job.

How do you exit a while loop in PL SQL?

Note: You must follow these steps while using PL/SQL Exit Loop.

Initialize a variable before the loop body.
Increment the variable in the loop.
You should use EXIT WHEN statement to exit from the Loop. Otherwise the EXIT statement without WHEN condition, the statements in the Loop is executed only once.

How do you loop a SQL query?

Loops in SQL Server

Example: WHILE Loop. DECLARE @i INT = 10; WHILE @i <= 30 BEGIN PRINT (@i); SET @i = @i + 10; END;
Example: WHILE with BREAK. DECLARE @i INT = 10; WHILE @i <= 30 BEGIN PRINT (@i); SET @i = @i + 10; IF @i = 30 BREAK; END;
Example: WHILE with CONTINUE.
Example: Nested Loop.