Select rows until a total amount is met in a column (mysql)

Question

I have seen this issue in SF, but me being a noob I just can\'t get my fried brain around them. So please forgive me if this feels like repetition.

My Sample Table

Answer 1

Here is a rough demo about cursor, may be it's helpful.

CREATE TABLE #t
(
    ID       INT IDENTITY,
    Supplier INT,
    QTY      INT
);


TRUNCATE TABLE #t;

INSERT  INTO #t (Supplier, QTY)
VALUES         (1, 2),
(1, 2),
(2, 5),
(3, 2),
(1, 3);

DECLARE @sum AS INT;

DECLARE @qty AS INT;

DECLARE @totalRows AS INT;

DECLARE curSelectQTY CURSOR
    FOR SELECT   QTY
        FROM     #t
        ORDER BY QTY DESC;

OPEN curSelectQTY;

SET @sum = 0;

SET @totalRows = 0;

FETCH NEXT FROM curSelectQTY INTO @qty;

WHILE @@FETCH_STATUS = 0
    BEGIN
        SET @sum = @sum + @qty;
        SET @totalRows = @totalRows + 1;
        IF @sum >= 5
            BREAK;
    END

SELECT   TOP (@totalRows) *
FROM     #t
ORDER BY QTY DESC;

CLOSE curSelectQTY;

DEALLOCATE curSelectQTY;