sql更新多個字段時不能以and分割

例子：  

update tbSpaceFile 
set cncStatus = 0 , [cnfSize]='256'
where [cnuFileID]= 'F758D46A-6DD5-4272-8FAA-FBE71DD05CDC'

 備註：不能用and分割，如：

update tbSpaceFile 
set cncStatus = 0  and  [cnfSize]='256'
where [cnuFileID]= 'F758D46A-6DD5-4272-8FAA-FBE71DD05CDC'