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feat: leistungsnachweis task_0 left_joins angefangen

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git-sandro 2026-02-27 10:54:37 +01:00
parent 522e144ca3
commit 6b9a2d40da
2 changed files with 25 additions and 0 deletions
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leistungsnachweis/.DS_Store vendored Normal file
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leistungsnachweis/task_0/left_joins.sql Normal file
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SELECT
kunde.name,
COUNT(bestellung.kunde_id)
FROM kunde
LEFT JOIN bestellung
ON kunde.id = bestellung.kunde_id
GROUP BY
kunde.id,
kunde.name;
SELECT
kunde.name,
SUM(bestellung_produkt.anzahl * produkt.preis)
FROM kunde
LEFT JOIN bestellung
ON kunde.id = bestellung.kunde_id
LEFT JOIN bestellung_produkt
ON bestellung.id = bestellung_produkt.bestellung_id
LEFT JOIN produkt
ON bestellung_produkt.produkt_id = produkt.id
GROUP BY
kunde.id,
kunde.name;
SELECT