MongoDB script Execution Add, delete, change, check

Collection Query4Db. Tablename.find ({"ListData.listData1.field":2});5 Non-collection queries6Db. Tablename.find ({"Field":2});7 Multi-Criteria Query8Db. Tablename.find ({"Field1":1, "Field2": "Test"});9 Ten Non-collection new OneDb. TableName.Update({},{$Set: {"New_field":1}}, {multi:true}) ADb. TableName.Update({"New_field": {$exists: false}},{$Set: {"New_field": Numberint ("0")}},{multi:true}) -  -  the Collection New -Db. Vac_order.find ({}). ForEach (function(Order){ -      Order. Orderdetail.foreach (function(detail) { -Detail. Mappingdetail.foreach (function(mapping) { +             if(!mapping.newfield) { -Mapping.newfield=0 //new Field +              } A         }) at     }) -Db. Vac_order.Save(Order) - }) -  - Non-collection Delete -Db. TableName.Update({}, {$unset: {"New_field":1}},{multi:true}) in Collection Delete -Db. Vac_order.find ({}). ForEach (function(Order){ to      Order. Orderdetail.foreach (function(detail) { +Detail. Mappingdetail.foreach (function(mapping) { -             if(Mapping.newfield) { the                 DeleteMapping.newfield//Delete a field *              } $         })Panax Notoginseng     }) -Db. Vac_order.Save(Order) the }) +  A  the Non-collection modifications +Db. TableName.Update({"Field": "Condition"},{$Set: {"field": "New Value"}},{multi:true}) -  $ Collection Modification $Db. Vac_order.find ({}). ForEach (function(Order){ -      Order. Orderdetail.foreach (function(detail) { -Detail. Mappingdetail.foreach (function(mapping) { the             if(Mapping.newfield) { -Mapping.newfield=1//re-assign valueWuyi              } the         }) -     }) WuDb. Vac_order.Save(Order) -})

MongoDB script Execution Add, delete, change, check