Hi Shekar,
You can visit the below link to create the table control with your ZTABLE.
http://learnmysap.com/sap-abab/58-create-table-control-using-abap-programming.html
In the property window of the field you can make it editable or non editable.
In table control as per the above tutorial all the data entered by the user will be available in the
Internal table after PAI.
Create a save button.
and on the UCOMM of SAVE use the modify statement to update the DB table with the Internal table.
Regards,