您不能引用WHERe别名，请改用：
SELECt country_ID*2/id*3.159 as my_id FROM `state`WHERe (country_ID*2/id*3.159)>2;
或使用子查询：
SELECt t.*FROM( SELECt country_ID*2/id*3.159 as my_id FROM `state`) as tWHERe t.my_id>2
您不能引用WHERe别名，请改用：
SELECt country_ID*2/id*3.159 as my_id FROM `state`WHERe (country_ID*2/id*3.159)>2;
或使用子查询：
SELECt t.*FROM( SELECt country_ID*2/id*3.159 as my_id FROM `state`) as tWHERe t.my_id>2
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