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假设Test集合的文档结构类似如下文档,_id是主键:
{ "_id":1, "UserName":"Zhang San", "Reply":"asdfghjkl"}{ "_id":2, "UserName":"Li Si", "Reply":"qwertyuiop"}
查询db.Test.find( { "_id": { $mod: [ 10, 0 ] } } )能否有效使用索引?
与 萌阔论坛 的连接断开,我们正在尝试重连,请耐心等待