Sql while loop select

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and. C: Simple While Loop. This loop continues doubling the prices until the maximum price is greater than $50 and then exits the WHILE.

This SQL Server tutorial explains how to use the WHILE LOOP in SQL Server (Transact- SQL ) with syntax and examples. In SQL Server, you use a WHILE LOOP when you are not sure how many times you will execute the loop body and the loop body may not execute even once. We also virtualized and explained the examples with flowcharts.

Eine Methode ist die Verwendung von Temp-Tabellen. Mit dieser Methode erstellt einen Snapshot der ersten SELECT-Anweisung zu verwenden als Grundlage für Cursoring. WHILE loop helps us to achieve iterative operations in SQL Server. One method is the use of temp tables.

This Oracle tutorial explains how to use the WHILE LOOP in Oracle with syntax and examples. In Oracle, you use a WHILE LOOP when you are not sure how many times you will execute the loop body and the loop body may not execute even once. A WHILE statement can be labeled. SQL statements, each terminated by a semicolon (;) statement delimiter.

Otherwise, control transfers to the statement after the WHILE LOOP statement. To prevent an infinite loop , at least one statement must change the value of boolean_expression to FALSE or NULL, transfer control outside the loop , or raise an exception. Ich habe beim stöbern nur feststellen können, dass es kein triviales Problem ist. Da SQL aufgrund der LOOP - und WHILE -Schleife jedoch turing-vollständig ist, sollte es lösbar sein. Viele gefundene Lösungen kann ich nicht nachvollziehen, da ich keine Erfahrung mit bspw.

Um eine maßgeschneiderte Lösung zu. Using the WHILE Statement in Stored Procedures After reading this article you will understand the basics of using the WHILE statement to write a loop within a stored procedure. All the examples for this lesson are based on Microsoft SQL Server Management Studio and the sample databases AdventureWorks and WideWorldImporters. SQL While Loop is used to repeat a block of statements for given number of times, until given condition is False. Hi All, Can we use the while loop inside a select statement?

Meaning, something like this: Code Block SELECT DATE, WHILE ( SELECT TOP DATEPART(HH,DATE) FROM SC. The while loop in SQL begins with the WHILE keyword followed by the condition which returns a Boolean value i. The body of the while loop keeps executing unless the condition returns false. Sometimes, you need to execute a block of statements repeatedly until a condition becomes true. WHILE LOOP Statement The WHILE LOOP statement runs one or more statements while a condition is TRUE.

Well, its a bit more complicated than that. I used the sample query as a simple example. My query fetches a list of customers depending on their activity in a given month and their status at the end of the month. If I can pass it the dates in an array, separated by commas. If the condition is TRUE, then the loop body executes.

In the following example, it will loop through all the records from EMP table where department is equal to and will print the employees salary. Description: The optional AS CURSOR clause creates a named cursor that can be referenced (after WHERE CURRENT OF) within the FOR SELECT loop in order to update or delete the current row. Otherwise the loop continues until the average price is greater than $30.