请问一个update多个字段的sql写法

请教一个update多个字段的sql写法
UPDATE APP_03 SET a.C10 = a.C10 + b.C08 ,a.C12 =a.C12+ b.C08, a.C16 = a.C16 + b.C08 FROM APP_03 a,APP_02 b WHERE a.C03=b.C06 AND b.C02='2201012009110012'; 


我是新手,这么写出错,请大家帮忙看一下

------解决方案--------------------------------------------------------

SQL code

update APP_03 a inner join APP_02 b on  a.C03=b.C06 SET a.C10 = a.C10 + b.C08 ,    a.C12 =a.C12+ b.C08,     a.C16 = a.C16 + b.C08