簡単:)
db.collection.find( { _id : { $in : [1,2,3,4] } } );
取得元:http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24in
簡単:)
db.collection.find( { _id : { $in : [1,2,3,4] } } );
取得元:http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24in