MYSQL更新列在案例

Question

我想設置object_type精英，高級或常規的價格價值，我如何更新我的數據庫中的object_type列？

我的SQL請求如下所示：

select price_per_m2, 
    (
    CASE 
     WHEN price_per_m2 > 500000 THEN 'Elite' 
     WHEN price_per_m2 > 200000 && price_per_m2 < 499999 THEN 'Premium' 
     ELSE 'Regular' 
    END) AS object_type 
from new_housing; 

Answer 1

隨着條件

UPDATE new_housing 
SET object_type = CASE WHEN price_per_m2 > 500000 THEN 'Elite' 
         WHEN price_per_m2 > 200000 && price_per_m2 < 499999 THEN 'Premium' 
         ELSE 'Regular' END 
WHERE price_per_m2; 

Answer 2

嘗試以下查詢：

UPDATE new_housing 
SET object_type = CASE WHEN price_per_m2 > 500000 THEN 'Elite' 
         WHEN price_per_m2 > 200000 && price_per_m2 < 499999 THEN 'Premium' 
         ELSE 'Regular' END 
WHERE <some condition>;