SELECT t.id_type, brand, model, countMod FROM types t
LEFT JOIN (
SELECT p.id_type, brand, model, COUNT(model) AS countMod
FROM products p
GROUP BY brand) p2
ON t.id_type = p2.id_type
WHERE t.id_type = "TCE"
ORDER BY brand
該查詢工作正常,但我失去了當然,在每個品牌下分組的模型。
有沒有辦法讓車型上市並統計?
I.e. brand1,model1,model2,model3,countMod = 3 - brand2,model1,model2,countMod = 2。
任何幫助將不勝感激。謝謝選擇與子選擇計數由於分組條款
不錯,短小而高效,謝謝 – michael