如果我正確理解您的要求，您希望通過1對所有行遞增eks列，只要所有行總的eks*harga是在預算范圍內。第一次通過后，如果仍有預算剩余，則要重新重復該過程。

我修改了，光標開放使用FOR循環，因為我很喜歡這種語法。

DECLARE

bbs jharga.budget%TYPE;

tharga jharga.budget%TYPE;

balance NUMBER;

CURSOR eksupdate

IS

SELECT isbn, judul, frekuensi, stok, harga, prioritas, eks,

kelompok, bobot

FROM pp_gabungan

FOR UPDATE OF eks NOWAIT;

BEGIN

--get the allotted budget

SELECT budget

INTO bbs

FROM jharga;

--get the total amount

SELECT SUM (eks * harga)

INTO tharga

FROM pp_gabungan;

balance := bbs - tharga; -- the balance amount

--as long as the balance is more than zero , the cusor will be repeatedly called.

-- also note that i've given a name to the loop, loop1

<>

WHILE balance > 0

LOOP

--for loop to open/fetch the cursor, this has been given name loop2

<>

FOR i IN eksupdate

LOOP

--if the balance amount is less than that of harga, exit from both the loops

EXIT loop1 WHEN balance < i.harga;

--if balance amount is more than harga, update the eks by 1

UPDATE pp_gabungan

SET eks = autoeks.eks + 1

WHERE CURRENT OF eksupdate;

--decrease the balance by harga

balance := balance - i.harga;

END LOOP loop2;

END LOOP loop1;

COMMIT;

EXCEPTION

WHEN OTHERS

THEN

ROLLBACK;

DBMS_OUTPUT.put_line (SQLERRM);

END;

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