A.SELECT 病历号,姓名,药品总价; FROM BRDA,MXB; GROUP BY 病历号 B.SELECT BRDA.病历号,BRDA.姓名,SUM(MXB.数量 * MXB.单价)AS药品总价; FROM BRDA INNER JOIN MXB; WHERE BRDA.病历号=MXB.病历号; GROUP BY BRDA.病历号 C.SELECT BRDA.病历号,BRDA.姓名,SUM(MXB.数量 * MXB.单价)AS 药品总价; FROM BRDA INNER JOIN MXB; ON BRDA.病历号=MXB.病历号; GROUP BY BRDA.病历号 D.SELECT BRDA.病历号,BRDA.姓名,SUM(MXB.数量 * MXB.单价)AS 药品总价; FROM BRDA INNER JOIN MXB; ON BRDA.病历号=MXB.病历号; ORDER BY BRDA.病历号