Lossy Unique Count with hll
Explore how to apply the HyperLogLog (hll) data type in PostgreSQL to estimate unique counts in large datasets. Learn to use hll functions and operators to compute approximate distinct values while optimizing storage and performance. This lesson guides you through practical queries and explains the benefits of lossy counting with hll.
We'll cover the following...
We'll cover the following...
We can rewrite the query using our hll data type now, even though, at this stage, it’s not going to be very useful because we still have ...