Valued inserted in table in oracle not saved?

I am using Oracle Database 11g and use the SQL command line. I created the tables and then inserted the values as usual .When i use the select query to see the inserted rows i see them without any problem. ``` SQL> connect Enter user-name: hotel Enter password: Connected. SQL> select * from hotel 2 ; no rows selected SQL> insert into hotel values('The Taj',11,'New York',5); 1 row created. SQL> select * from hotel; NAME HOTEL_ID -------------------------------------------------- ---------- LOCATION STAR_RATING -------------------------------------------------- ----------- The Taj 11 New York 5 ``` HOWEVER after i close the sql command line, open again and again use the select query to see all the rows...all the rows are gone. i get "no rows selected" ``` SQL> connect Enter user-name: hotel Enter password: Connected. SQL> select * from hotel; no rows selected SQL> ``` I dont know why this is happening. Please Help! And i am completely new to this.. so please dont judge :)