Case中的MYSQL Update列

Question

我想按价格值设置object_type Elite，Premium或Regular，我如何更新数据库中的object_type列？

我的SQL请求如下：

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

尝试以下查询：

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>;

Answer 2

有条件

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;