feat(exercises): completed all exercises #44
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All required exercises have been completed and also tested
Menendez2004
changed the title
fabio248
reviewed
Dec 5, 2024
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| states s | ||
| JOIN | ||
| countries c |
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When you assign the table's name after FROM or JOIN statement I prefer to use the 3 letters to improve readability in the query. I won't comment the same on the following queries but you should solve it there as well.
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| SELECT COUNT(*) AS employees_wothout_bosses |
| SELECT | ||
| c.name AS country_name, | ||
| o.address AS address, | ||
| COUNT(e.id) AS numer_employees |
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| -- 4 | ||
| SELECT | ||
| s.id AS supervisor_id, | ||
| COUNT(e.id) AS number_of_employe |
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Fix the typo in employe and it should be in plural.
| @@ -1,5 +1,1681 @@ | |||
| --er-- PostgreSQL database dumpia-- | |||
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We shouldn't modify this file, just the answers.sql
fabio248
reviewed
Dec 5, 2024
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| HAVING | ||
| s.name = 'Colorado'; |
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Here we might use WHERE clause.
https://www.sql-easy.com/learn/how-to-use-having-clause-in-sql/
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All required exercises have been completed and also tested