我应该如何在sql数据库上存储iOS设备令牌？

I am making an iOS app which receives push notifications. Everything is set up correctly, and I have made it work already. The way I tested it was to manually enter the device token of my own phone in the .php file which sent the notification. I know I need to set up an SQL-database which stores all the device-tokens. I also know I have to "call" this website in the dedRegisterForRemoteNotificationWithDeviceToken in Xcode. I know how to do all this, but I am not sure how I should create the field for the actual token in the database, and how to parse it correctly. I am making an iOS app which receives push noti