在MySQL連接3個表來選擇字段

Question

我有數據庫結構是怎樣的圖像下方

我想選擇所有的街道，與街道名稱，城市名稱，省名。我的代碼是這樣的：

SELECT province.name as province, city.name as city, subdistrict.name as subdistrict 
    from provinces province, cities city, subdistricts subdistrict 
    WHERE province.id = city.id AND city.id = subdistrict.id; 

，但我只得到儘可能多的總省份的數據並非所有的街道數據

Answer 1

您基本的SQL缺少一個逗號，但一般應該工作。我強烈建議使用更現代化的連接語法： -

SELECT province.name AS province, 
     city.name AS city, 
     subdistrict.name AS subdistrict 
FROM provinces province 
INNER JOIN cities city 
ON province.id = city.id 
INNER JOIN subdistricts subdistrict 
ON city.id = subdistrict.id; 

然而，從你的描述，我不能確定，如果你正在嘗試做一些彙集處理？