java - jdbc中MySql更新语句

Question

当客户端程序上的库存发生变化时，我正在尝试更新我的数据库。更新语句最终包含正确的值，但在尝试执行更新时出现 mysql 语法错误。

String sql = "UPDATE video_device SET serialNumber='" + device.getSerialNumber() + "', inventoryNumber=" + device.getInventoryNumber() + ", ownerName='" + device.getServicePerson().getName() 
                    + "', ownerTitle='" + device.getServicePerson().getJobTitle() + "', ownerEmail='" + device.getServicePerson().getEmail() + "', ownerPhoneNumber='" + device.getServicePerson().getPhoneNumber() 
                            + "', dateYear=" + device.getDateAquired().getYear() + ", dateMonth=" + device.getDateAquired().getMonth() + ", dateDay=" + device.getDateAquired().getDay() + ", typeDevice='" + device.getTypeDevice() 
                                   + "', description='" + device.getDescription() + "', price=" + device.getPrice() + ", locationBuilding='" + device.getLocation().getBuilding() + "', locationRoomNumber=" 
                                    + device.getLocation().getRoomNumber() + " WHERE serialNumber='" + orig.getSerialNumber() + "', inventoryNumber=" + orig.getInventoryNumber() + ", ownerName='" + orig.getServicePerson().getName() 
                    + "', ownerTitle='" + orig.getServicePerson().getJobTitle() + "', ownerEmail='" + orig.getServicePerson().getEmail() + "', ownerPhoneNumber='" + orig.getServicePerson().getPhoneNumber() 
                            + "', dateYear=" + orig.getDateAquired().getYear() + ", dateMonth=" + orig.getDateAquired().getMonth() + ", dateDay=" + orig.getDateAquired().getDay() + ", typeDevice='" + orig.getTypeDevice() 
                                   + "', description='" + orig.getDescription() + "', price=" + orig.getPrice() + ", locationBuilding='" + orig.getLocation().getBuilding() + "', locationRoomNumber=" 
                                    + orig.getLocation().getRoomNumber() + ";";

Answer 1

您似乎用逗号分隔 WHERE 条件。您必须使用 AND/OR 来分隔它们。

你在做什么:

SELECT ...
FROM ...
WHERE a=1, b=2, c=3
etc

你应该做什么:

SELECT ...
FROM ...
WHERE a=1 AND b=2 AND C=3
ETC