javascript - MongoDB select where in array of _id?

Question

is possible in mongo db to select collection's documents like in SQL :

SELECT * FROM collection WHERE _id IN (1,2,3,4);

or if i have a _id array i must select one by one and then recompose the array/object of results?

Answer 1

Easy :)

db.collection.find( { _id : { $in : [1,2,3,4] } } );

taken from: http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24in