Sort, Filter, and Order Realtime Database Queries
Explore how to sort, filter, and order data in Firebase Realtime Database using key functions like orderByChild, orderByKey, limitToFirst, and startAt. Learn to manage query constraints effectively to retrieve specific subsets of your data for real-time web applications.
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We may need to retrieve ordered or filtered data to use on our application. We can use the Realtime Database query function to sort data by key, value, or the child value. Similarly, the query function provides a range of options to filter data. This function takes the query instance as its first parameter, followed by a comma-separated list of query constraints to be applied.
Sort data
To sort data, we must first specify an order method. The Firebase Realtime Database provides three orderBy functions to retrieve sorted data. These are as follows:
orderByChild: This function allows us to order