update table set column1 = 'a', column2='b', column3='c' where id = '';
update 表名
set 栏位1='' , 栏位2='',...
where ...
给你举个例子吧
UPDATE Person SET Address = 'Zhongshan 23', City = 'Nanjing'
WHERE LastName = 'Wilson'
update 表 set 字段1=“”,字段2="XXX",字段3=AAA;