HI, Thanks for the correction. I updated my query and modified as below. I wanted to link the barcode in the marc tag(773 / 0) to the items serial barcode for getting the serial publication date and serial planned date. In the below query all fields are having correct values except the serial planneddate and serial published and they are blanks, as Iam not able to link the serial barcode with the marc barcode(773/o). SELECT ExtractValue(marcxml,'//datafield[@tag="773"]/subfield[@code="o"]') AS accno, ExtractValue(marcxml,'//datafield[@tag="773"]/subfield[@code="t"]') AS Journalname, ExtractValue(marcxml,'//datafield[@tag="690"]/subfield[@code="a"]') AS subject, ExtractValue(marcxml,'//datafield[@tag="300"]/subfield[@code="a"]') AS imprint, biblio.title as Title, biblio.author as Author, biblio.abstract as abstract, items.enumchron,serial.planneddate,serial.publisheddate FROM biblio LEFT JOIN biblioitems on (biblioitems.biblionumber=biblio.biblionumber) LEFT JOIN items on (items.biblionumber=biblio.biblionumber) LEFT JOIN serial on (serial.biblionumber=biblio.biblionumber) where ExtractValue(marcxml,'//datafield[@tag="773"]/subfield[@code="o"]')>'400000' Thanks in advance. -- Regards T. Suresh Kumar