之前考虑到严谨在xml配置文件中写sql语句时添加;结尾，使用PageHelper发现出现这样的问题，看来PageHelper是在原有语句后面添加改造语句，所以规范一些来说xml配置文件中写sql语句是不是不应该写;？

<select id="selectGoodsPages" resultType="com.imooc.mybatis.entity.Goods">
    SELECT * FROM t_goods WHERE current_price &lt; 1000;
</select>

​### SQL: SELECT * FROM t_goods WHERE current_price < 1000;  LIMIT ?, ?
### Cause: java.sql.SQLSyntaxErrorException: 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 'LIMIT 20, 10' at line 2