为什么此SQL会是如此结果？？？？？？？？？？？？

[刘云涛]

我是想查[cheap]字段='cheap_true' 的所有记录，数据库中就一条记录，但加上那些模糊搜索的条件就出现了很多记录，
如：“1” 是我外部传入的参数，得到一个结果集到最后我都用[cheap]='cheap_true' 限制了，为什么不好用呢？

select * from [chanpin] where name like '%1%' or jiage like '%1%' or neirong like '%1%' and [cheap]='cheap_true' order by id desc

[monkeys]

or 的原因

[monkeys]

select from [chanpin] a [chanpin] b where a.name like '%1%' or a.jiage like '%1%' or a.neirong like '%1%' and b.[cheap]='cheap_true' order by b.id desc

[jbj001]

(name like '%1%' or jiage like '%1%' or neirong like '%1%') and [cheap]
='cheap_true'

要加括号！！！

[好记忆不如烂笔头abc]

select * from [chanpin] where (name like '%1%' or jiage like '%1%' or neirong like '%1%') and [cheap]='cheap_true' order by id desc

[aoenzh]

HAHA