Hello, Mohammed.
You can use BRTOOLS, follow the procedures:
Managing Database Statistics with BR*Tools
https://help.sap.com/saphelp_nwpi71/helpdata/en/04/5341500f8041c28cf89bcd83e6d6f1/content.htm
Exporting Tables with BR*Tools
http://help.sap.com/saphelp_nw73/helpdata/en/46/b851ad2aad2c74e10000000a114a6b/content.htm
Regards,
John G