I'm starting in Firebase and would like to know how to query with filter, example:
Select, only people who live in Porto Alegre.
Today, what I have is a DB structure.
I have 4 tables, street, neighborhood, city and state. The first one I posted is the table is state, the other is street / street.
Firebase uses a JSON-tree structure, in your case, you could create a 'child' called people, listing all the people on your system. Each person would be a knot with children content their characteristics.
firebase
-pessoas
-uid1
-nome:"USER 1"
-UF:"RS"
-uid2
-nome:"USER 2"
-UF:"RS"
-uid3
-nome:"USER 3"
-UF:"SC"
In your search, you can use "equalTo ()" and filter for the specific "child", in which case you could fetch all people with the child "UF" equalTo () 'RS' / p>
Firebase NOT works as a SQL Database Manager System. One of the main differences is that Firebase focuses on distributing direct data rather than on where ) and putting together join data. This means that if you are careful enough to learn how Firebase works and model your data following Firebase logic, you do not need a dedicated queries server because they are done right in the client device.
For more information, watch David East's playlist on Firebase Database for SQL Developers , available at link .