MongoDB将字符串按UTF-8进行字典排序,并可将$gt($ greater than,大于)和$lt($ less than,小于)用于字符串查询
列出所有name字段首字母在D前的文档:
>db.people.find( { name: { $lt:"D" } } );
MongoDB将字符串按UTF-8进行字典排序,并可将$gt($ greater than,大于)和$lt($ less than,小于)用于字符串查询
列出所有name字段首字母在D前的文档:
>db.people.find( { name: { $lt:"D" } } );