db.COMMODITY_COMMODITY.find(
{
"areaCode" : "320100" ,
"backCatalogId" : { "$in" : [ 111111, 22222]} ,
"typeCode" : { "$in" : [ "appointment" , "groupon"]} ,
"status" : "1" ,
"name" : { "$regex" : "汽车"}
},{"backCatalogId":true,"_id":0}
)
原文：http://www.cnblogs.com/usual2013blog/p/4076897.html