SQL analytics
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Overview
SQL analytics refers to using SQL queries to analyze data and derive insights, typically working with large datasets stored in databases or data warehouses. Rather than just retrieving or updating individual records, SQL analytics focuses on aggregating, transforming, and examining data patterns across entire datasets.
Key Components
SQL analytics heavily relies on analytical functions like COUNT
, SUM
, AVG
, and more complex operations like window functions (using OVER
clauses) and common table expressions (CTEs). These queries often combine multiple tables through joins and use GROUP BY
clauses to aggregate data at different levels of granularity.
DuckDB Examples
Here's a simple analytical query that shows sales trends over time:
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SELECT
date_trunc('month', order_date) as month,
count(*) as num_orders,
sum(amount) as total_sales,
avg(amount) as avg_order_value
FROM orders
GROUP BY date_trunc('month', order_date)
ORDER BY month;
A more complex example using window functions to calculate running totals:
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SELECT
category,
sales_date,
daily_sales,
sum(daily_sales) OVER (
PARTITION BY category
ORDER BY sales_date
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
) as running_total
FROM sales_data;
Modern Analytics Stack
SQL analytics is a cornerstone of modern data tools like dbt for transformations and Preset or Metabase for visualization. These tools build upon SQL's analytical capabilities to create reproducible data transformations and interactive dashboards.
Performance Considerations
DuckDB is specifically optimized for analytical workloads, using columnar storage and vectorized execution to process large amounts of data efficiently. Unlike traditional row-oriented databases like PostgreSQL, DuckDB can execute complex analytical queries much faster, especially when working with large datasets that fit in memory.