I created a shema succesfully but the data are not apearing when I created the dataset ... so when I reference to this dataset the field is apearing as null!

[user320]

for examble the shema passenger :

passengerID	age	firstName	lastName	address	creditCard1	creditCard2	creditCard3	ticketNumber
21-502-1867	15	Panayiotis	Kouros	Ermou 45	5610571558114634			2189529905
36-609-2800	94	Ioanna	Georgiou	Dionysiou Areopagitou 17	374288895384203	5020934422222261141	5002358197511297	3310239446
when I open the database passenger it just shows up the headers passengerID age firstName lastName address creditCard1 creditCard2 creditCard3 ticketNumber although it writes Values


Showing only the first 20 of 999 total rows In conclusion when I reference for examble to passengerID from another Table it shows null values? What I am doing wrong?Thank you in advance !