OR條件不返回數據

Question

mysql> SELECT MIN(elevation_in_meters) as AE,common_name 
    -> FROM paplants 
    -> WHERE common_name="common lilac" 
    -> OR common_name="eastern redbud" 
    -> OR common_name="rugosa rose"; 

我只獲得了數據「共同丁香花」，但我也應該爲「東方紫荊」和獲取數據「藿香玫瑰」

Answer 1

添加GROUP BY common_name。這應該有所幫助。