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Martin Thoma 2013-07-27 15:29:03 +02:00
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documents/musterloesung-db-klausur-b/d3d.sql Normal file
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CREATE VIEW Beratungsanzahl AS (
SELECT berater_id, count(DISTINCT Berater.berater_id) AS Anzahl
FROM Berater
FULL OUTER JOIN Kunden ON Berater.berater_id = Kunden.berater_id
GROUP BY berater_id
)