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Update improve_query.md (#418)

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abdrahimm
2023-08-24 20:56:22 +01:00
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commit 66eaea5437
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topics/sql/improve_query.md
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@@ -3,8 +3,7 @@
1. Improve the following query
```
SELECT count(*)
SELECT COUNT(purchased_at)
FROM shawarma_purchases
WHERE
YEAR(purchased_at) == '2017'
WHERE purchased_at BETWEEN '2017-01-01' AND '2017-12-31';
```