mysql更新字段为“”或 null
时间:2021-12-15 作者:匿名
//更新为””串
update taxi_driver_info set wechat = ” where driverno = ‘0440923198101075636’;
//更新为null
update taxi_driver_info set wechat = null where driverno = ‘0440923198101075636’;
//更新为””串
update taxi_driver_info set wechat = ” where driverno = ‘0440923198101075636’;
//更新为null
update taxi_driver_info set wechat = null where driverno = ‘0440923198101075636’;