Database
[{"Name of Restaurant":"Briyani Center","Address":" 336 & 338, Main Road","Location":"XYZQWE","PriceFor2":"500.0","Dining Rating":"4.3","Dining Rating Count":"1500",},{"Name of Restaurant":"Veggie Conner","Address":" New 14, Old 11/3Q, Railway Station Road","Location":"ABCDEF","PriceFor2":"1000.0","Dining Rating":"4.4",}]
Query
db.collection.update({},[{$set:{PriceFor2:{$toDouble:"$PriceFor2"}}}],{multi:true})