求问高手，这是什么错误

韶聪

同样的代码，放在不同的机子上运行，一台计算机显示正常，另一台运行时，页面报这样的错
A Database Error Occurred

Error Number: 1064

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 'and t1.modelid = t2.id and t2.isvalid = 1' at line 5

select t2.modelname, t2.url from shutcuts as t1 inner join models as t2 on t1.userid = and t1.modelid = t2.id and t2.isvalid = 1
这是为什么啊？

zhouli520

select t2.modelname, t2.url from shutcuts as t1 inner join models as t2 on t1.userid = and t1.modelid = t2.id and t2.isvalid = 1

t1.userid呢?

baiyuxiong

select t2.modelname, t2.url from shutcuts as t1 inner join models as t2 on t1.userid = and t1.modelid = t2.id and t2.isvalid = 1
你的SQL有错
再者， 两台机器连的是不是同个数据库，数据表结构是不是一样的？