How to select first row in each ‘Group By’ group?
Problem You have a table with multiple rows of data for each group, and you want to select the first row from each group. From the orders table below, select the first row in each group. Input order_id customer_id order_date product_name quantity 1 1 2023-01-01 Laptop 1 2 1 2023-01-02 Mouse 2 3 2 2023-01-03 […]
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