Get data from all child node's child id firebase

Question

Here is the json structure I am using:

|-a
  |--date1
     |--uid1
     |--uid2
  |--date2
     |--uid3
  |--date3
     |--uid1

I need to get uid1 for all dates. How ,to query for the same using firebase .

Possible duplicate of [How to retrieve data from Firebase Database?](https://stackoverflow.com/questions/38541098/how-to-retrieve-data-from-firebase-database) — gegobyte, Sep 09 '17 at 13:38
Is uid1 a key or value within each date node? If it's a value, what is it's key? — Jay, Sep 09 '17 at 16:59

score 0 · Answer 1 · answered Sep 09 '17 at 11:46

One way would be to duplicate your data structure like:

|-a
  |--date1
    |--uid1
    |--uid2
  |--date2
    |--uid3
  |--date3
    |--uid1
|-a-uid1
  |--date1
  |--date3

This kind of duplication is quite common for NoSQL databases and it will provide you the best performance (query response time)

1 Answers1