SQL Aggregate Functions Interview Questions

Let’s take a deeper dive into the must-know SQL aggregate concepts for your next Data Science Interview.

Today, we have millions and billions of rows of data being generated each second. However, we usually need a single metric to flag changes and make business decisions. For example — the total sales in the last quarter, the average churn rate, the number of ad impressions served, etc. Aggregation functions help generate these metrics. Aggregate …

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