What is the usage of GROUP BY in SQL?
An example of an AI chatbot conversation about SQL's GROUP BY clause usage.
What is the usage of GROUP BY in SQL?
The GROUP BY clause in SQL is used to arrange identical data into groups. It is often used with aggregate functions like COUNT, SUM, AVG, etc.
Can you give me an example of how to use GROUP BY?
Sure! For instance, if you have a table of sales data, you can use GROUP BY to summarize total sales by each product like this: SELECT product_id, SUM(sales) FROM sales_data GROUP BY product_id;
What happens if I don't use GROUP BY with aggregate functions?
If you use aggregate functions without GROUP BY, SQL will return a single result for the entire dataset instead of grouped results.
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