Shulou(Shulou.com)06/01 Report--

1. Limit returns the specified number of data db.persons.find ({}, {_ id:0,name:1}) .limit (3) 2. Skip returns the specified data span db.persons.find ({}, {_ id:0,name:1}) .limit (3) .skip (1) 3, sort sort db.persons.find ({}, {_ id:0,name:1,age:1}). Sort ({age:1}) / / incremental db.persons.find ({}) {_ id:0,name:1,age:1}) .sort ({age:-1}) / / decreasing

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