0
UPDATE cab_details SET travel_company_person_name='$user_role', driver_name='$driver_name' , driver_phone_no='$driver_phone' , vehicle_name='$vehicle_name' , vehicle_no='$vehicle_no' , starting_kms = '$starting_kms' , region='$region', cd_comments='$comments' WHERE travel_id='$id' AND ((travel_id NOT IN (SELECT cancel_customer.ctravel_id FROM cancel_customer WHERE ctravel_id='$id')) AND travel_id NOT IN (SELECT tcc_travel_id FROM travel_company_cancel WHERE tcc_travel_id='$id' AND tcc_travel_cancel_company='$travel_company'))
在上面的sql查詢中,mysql_affected_rows()在數據與現有數據匹配並且條件不滿足時返回0。 我想提醒用戶「沒有數據變化」或「條件不滿意」。mysql更新查詢檢查數據是否更新或匹配
我該怎麼做?