How do you implement a loop in SQL?

How do you implement a loop in SQL query?

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.

Can I create a loop in SQL?

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

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 =
  4. SELECT COUNT(*)
  5. FROM tblFilm.
  6. WHERE FilmOscarWins = @Counter.
  7. SET @Counter += 1.
  8. END.

What are 3 types of loops in SQL?

Controlling Loop Iterations: LOOP and EXIT Statements. LOOP statements execute a sequence of statements multiple times. There are three forms of LOOP statements: LOOP , WHILE-LOOP , and FOR-LOOP . For a description of the syntax of the LOOP statement, see “LOOP Statements”.

How do I create a list in SQL?

You can create lists of SQL Query or Fixed Data values . In the Data Model components pane, click List of Values and then click Create new List of Values. Enter a Name for the list and select a Type.

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Do WHILE loop in SQL procedure?

The WHILE statement defines a set of statements to be executed until a condition that is evaluated at the beginning of the WHILE loop is false. The while-loop-condition (an expression) is evaluated before each iteration of the loop.

What is a nested loop give an example?

A nested loop is a (inner) loop that appears in the loop body of another (outer) loop. The inner or outer loop can be any type: while, do while, or for. For example, the inner loop can be a while loop while an outer loop can be a for loop.

How do I create a stored procedure?

How to Create a Stored Procedure

  1. In Object Explorer, connect to an instance of Database Engine and then expand that instance.
  2. Expand Databases, expand the AdventureWorks2012 database, and then expand Programmability.
  3. Right-click Stored Procedures, and then click New Stored Procedure.

How do you use a while loop in PL SQL?

Example of PL/SQL While Loop

  1. DECLARE.
  2. i INTEGER := 1;
  3. BEGIN.
  4. WHILE i <= 10 LOOP.
  5. DBMS_OUTPUT.PUT_LINE(i);
  6. i := i+1;
  7. END LOOP;
  8. END;

Which is better cursor or while loop in SQL Server?

While SQL While loop is quicker than a cursor, reason found that cursor is defined by DECLARE CURSOR. Every emphasis of the loop will be executed inside system memory and consuming required server assets.

Is SQL a programming language?

SQL stands for Structured Query Language, which is a programming language used to communicate with relational databases. … Despite its critics, SQL has become the standard language for querying and manipulating data stored in a relational database.

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How do I create a foreach loop in SQL Server?

1. create a temp table and put the records you want to iterate in there 2. use WHILE @@ROWCOUNT <> 0 to do the iterating 3. to get one row at a time do, SELECT TOP 1 <fieldnames> b. save the unique ID for that row in a variable 4.

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