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How to use looping in SQL query?
I am detailing answer on ways to achieve different types of loops in SQL server.
- FOR Loop. DECLARE @cnt INT = 0; WHILE @cnt < 10 BEGIN PRINT ‘Inside FOR LOOP’; SET @cnt = @cnt + 1; END; PRINT ‘Done FOR LOOP’;
- DO.. WHILE Loop.
- REPEAT..UNTIL Loop.
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 you do 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.
How to run another query for each result?
Loop through results and run another query for each result… Best practice? #838 Hey all. I’m having trouble looping through a results set and then running another query for each result in order to attach some additional data. Below is my code. “Pages” is a result from a Sequelize query.
How to run SQL queries in a loop?
This part of the series will show you how to use a loop to execute a query multiple times, using a different value in the WHERE clause of the query each time. To demonstrate this technique we’re going to list the number of films which have won different numbers of Oscars. The output we’re aiming for is shown in the diagram below:
Can a VBA query be used in another query?
Since you are using VBA to run this, you can loop through your recordsets and yes you can use a value from one query in the next query. There are alot of resources out there to help. VBA: Working with RecordSets. Looping through Record Sets. Code through all records
How is the counter variable used in a loop?
The @Counter variable is used to keep track of the number of times the loop has run, as it did in the previous example. The @MaxOscars variable is used to hold the highest number of Oscar wins for a single film, which will tell us when to stop looping.