Do WHILE LOOP in SQL Server?

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.

How WHILE LOOP works in SQL?

Sets a condition for the repeated execution of an SQL statement or statement block. The statements are executed repeatedly as long as the specified condition is true. The execution of statements in the WHILE loop can be controlled from inside the loop with the BREAK and CONTINUE keywords.

How do you run a loop in SQL Server?

The syntax for the While Loop in SQL Server (T-SQL) is, WHILE BEGIN. …For example,

1. DECLARE @numValue INT = 0.
2. WHILE @numValue < 5.
3. BEGIN.
4. SET @numValue = @numValue + 1.
5. PRINT ‘Inside WHILE LOOP ‘ + CAST(@numValue AS VARCHAR) + ‘ !! ‘
6. END.
7. PRINT ‘WHILE LOOP End !! ‘

Can we use loop in SQL?

SQL WHILE loop provides us with the advantage to execute the SQL statement(s) repeatedly until the specified condition result turn out to be false. Otherwise, the code flow will exit the loop. If any SQL statement exists outside the loop, it will be executed.

What is the function of WHILE LOOP?

The while loop is used to repeat a section of code an unknown number of times until a specific condition is met. For example, say we want to know how many times a given number can be divided by 2 before it is less than or equal to 1.

How do I stop a WHILE LOOP in SQL?

SQL Server BREAK statement overview To exit the current iteration of a loop, you use the BREAK statement. In this syntax, the BREAK statement exit the WHILE loop immediately once the condition specified in the IF statement is met. All the statements between the BREAK and END keywords are skipped.

What are the difference between for loop and while loop?

for loop: for loop provides a concise way of writing the loop structure. Unlike a while loop, a for statement consumes the initialization, condition and increment/decrement in one line thereby providing a shorter, easy to debug structure of looping.

How do I stop a while loop in SQL Server?

Avoid the use of the WHILE LOOP. Use UNION ALL instead of UNION whenever is possible. Avoid using the joins of multiple tables in the where and join in the from clause.

What is for loop in PL SQL?

PL/SQL for loop is used when when you want to execute a set of statements for a predetermined number of times. The loop is iterated between the start and end integer values. The counter is always incremented by 1 and once the counter reaches the value of end integer, the loop ends.