Syntax of for-loop in SQL Server

Extra Info

Just to add as no-one has posted an answer that includes how to actually iterate over a dataset inside a loop. You can use the keywords OFFSET FETCH.

Usage

DECLARE @i INT = 0;
SELECT @count=  Count(*) FROM {TABLE}

WHILE @i <= @count
BEGIN
       
    SELECT * FROM {TABLE}
    ORDER BY {COLUMN}
    OFFSET @i ROWS   
    FETCH NEXT 1 ROWS ONLY  

    SET @i = @i + 1;

END

There is no for-loop, only the while-loop:

DECLARE @i int = 0

WHILE @i < 20
BEGIN
    SET @i = @i + 1
    /* do some work */
END

T-SQL doesn't have a FOR loop, it has a WHILE loop
WHILE (Transact-SQL)

WHILE Boolean_expression
BEGIN

END