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What if I use ORDER BY?
First I just want to state that I totally understand how GROUP BY works. But still, I want to know clearly why when I used ORDER BY like this:
SELECT category, COUNT(*) AS product_count FROM products ORDER BY category;
the result came up this way:
Why only 1 row showed up? Where are the two other rows Clothing and Electronics? I did not use any query to leave those two categories out. This really baffled me. Please help!
ivana kantnerova15,673 Points
because there is no group by category, the aggregation function "count (*)" counts all rows of the table => the result has only one row .. it displays only the first category only because there is no other rows in results ... agregational function always returns only one value