我有進行分組的MySQL查詢和統計,但我不能有線路,其中COUNT(*)給出0返回爲零計數和的GroupBy
代碼:
SELECT
e.sexe as sex, count(*) as number, n.id_niveau as niv
FROM
fact_resultat f, dim_etudiant e, dim_niveau n
WHERE
f.id_etudiant = e.id_etudiant AND f.id_niveau = n.id_niveau AND
resultat = 'Non Admis' AND etape = '1'
AND filiere = 'API'
GROUP BY sexe , niv
我怎樣才能使它返回0計數的行?
請參閱https://meta.stackoverflow.com/questions/333952/why-should-i-provide-an-mcve-for-what-seems-to-me-to-be-a-very-simple- sql-query – Strawberry
你說「我不能有計數爲0的行」和「我怎樣才能讓它返回0行」。在我看來,這些意思是「我不想要任何0計數行」和「我只想要0計數行」。你能否更準確地說出你想要的是什麼? –