java-mysql语句这样有错误问题出在哪？
sql语句：
String tel = obj.getString("tel");
String email = obj.getString("email");
......
sqls.add("update from user loginName='"+uloginName+"',userName='"+userName+"' where loginName='"+loginName+"'");
sqls.add("update from userinfo loginName='"+uloginName+"',gender='"+gender+"',birthday='"+birthday+"',address='"+address+"', mobile='"+mobile+"',tel='"+tel+"',email='"+email+"',quanpin='"+CHNUtil.getFullSpell(userName)+"',jianpin='"+CHNUtil.getFirstSpell(userName)+"' where loginName='"+loginName+"'");
错误信息：
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'from userinfo loginName='s123',gender='0',birthday='2015-12-10',address='1111',m' at line 1
我要往两个表里更改这些信息，但是出错了。初学者，不知道怎么错了