add description about query "DISPLAY"

Author: msdeep14

README.md

@@ -48,4 +48,13 @@ For execution: Open directory DeepDatabase(branch:master) and on terminal
 2. Type **./deepdb** for running project.
 
 3. Type **make clean** for recompiling the project.
+
+## IN DEVELOPMENT:
+For displaying the table contents, you have to select option 5 from menu and the queries supported by it are, do care about syntax, hence complete parser is not implemented.
+
+select * from table_name;
+
+select id,name from table_name;
+
+select id,name from table_name where id = 1;