Common questions

Can you do a for loop in SQL?

Can you do a for loop in SQL?

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

How do you do a for 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.

How do you write 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 run a SQL query in a for loop?

Running a Query Inside the Loop

  1. WHILE @Counter <= @MaxOscars.
  2. BEGIN.
  3. SET @NumFilms =
  5. FROM tblFilm.
  6. WHERE FilmOscarWins = @Counter.
  7. SET @Counter += 1.
  8. END.

What can a cursor FOR loop use?

The cursor FOR LOOP statement implicitly declares its loop index as a record variable of the row type that a specified cursor returns, and then opens a cursor. With each iteration, the cursor FOR LOOP statement fetches a row from the result set into the record.

Which form of continue will exit any loop SQL?

Oracle Database 11g offers a new feature for loops: the CONTINUE statement. Use this statement to exit the current iteration of a loop, and immediately continue on to the next iteration of that loop. This statement comes in two forms, just like EXIT: the unconditional CONTINUE and the conditional CONTINUE WHEN.

What is SQL loop?

SQL Loop : Use Loops to Iterate through Code Effectively. SQL stands for Structured Query Language. It is specifically designed to retrieve and manipulate data from relational databases. PL/SQL is a procedural extension of SQL and is well integrated with the latter.


SQL While loop: Understanding While loops in SQL Server 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. A simple example: Printing numbers with SQL While loop. Inserting records with SQL While loop. Implementing paging with SQL While loop. The CONTINUE and BREAK statements.

Do loops in SQL?

There are no LOOPS in SQL, only in PL/SQL. Here’s a few examples based on existing Oracle table – copy/paste to see results: You will certainly be able to do that using WITH clause, or use analytic functions available in Oracle SQL.

What is a loop in Oracle?

In Oracle PL/SQL, a LOOP is an iterative (repeating) control structure. Loops repeat a specified number of times based on one or more conditions. Inside the loop, one or more PL/SQL statements are evaluated and processed in the order they appear.

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