SELECT * FROM (
SELECT SUM(A.Precio)AS "Total gastado", B.email FROM ARTICULO_EVENTO A
JOIN (C.email FROM PEDIDO_ARTICULO_EVENTO C)B
ON(B.email=A.email)
WHERE B.FechaHora > TO_DATE('20-08-2012', 'MM-DD-YYYY')
GROUP BY (B.email)
ORDER BY SUM(A.Precio) DESC
)
WHERE ROWNUM <=5;
ORA-00907: 缺少右括号。在第 3 行。
¿ 为什么会出现此错误?