How can I use BigQuery to identify anomalies in our sales data?

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How can I use BigQuery to identify anomalies in our sales data?

Asked on Dec 07, 2025

Answer

To identify anomalies in your sales data using BigQuery, you can leverage SQL queries to detect outliers or unusual patterns. This involves analyzing your dataset for deviations from expected behavior, often using statistical methods or machine learning models.

Example Concept: Use BigQuery's SQL capabilities to perform anomaly detection by calculating statistical measures such as mean and standard deviation. You can identify anomalies by filtering rows where sales figures deviate significantly from the average, using thresholds like 2 or 3 standard deviations from the mean.

Additional Comment:

Consider using BigQuery ML for more advanced anomaly detection models, such as ARIMA or K-means clustering.
Ensure your sales data is clean and pre-processed for accurate analysis.
Visualize anomalies using Looker Studio for better insights and decision-making.

✅ Answered with Analytics best practices.

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