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Editorial Team
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Asked: 2026-06-05T11:08:48+00:00

I have a same result when I execute both queries from different functions. I

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I have a same result when I execute both queries from different functions. I just wanted to know which query is optimized or logically correct (see query 1 and 2 below).

I get monthly data with respect to sale.purchase_date

Query 1

SELECT sales.purchase_date FROM `sales` 
WHERE sales.purchase_date LIKE  '2012-06-%';

Query 2

SELECT sales.purchase_date FROM `sales` 
WHERE MONTH(sales.purchase_date) = '6' AND YEAR(sales.purchase_date) = '2012';
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1 Answer

  1. Editorial Team

    Both of those require you to do a table scan because you need to examine the purchase_date to see if the row will be in and can’t use an index. I suggest you use a BETWEEN query so you can make use of any index on purchase_date:

    WHERE sales.purchase_date BETWEEN '2012-06-01' AND '2012-06-30'
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