my$sql="select cu.ccds_uid, a.nuc_acc from Accessions a, Accessions_GroupVersions agv, GroupVersions gv, CcdsUids cu where a.accession_uid = agv.accession_uid and a.organization_uid=1 and agv.group_version_uid=gv.group_version_uid and gv.ccds_status_val_uid in (3) and cu.group_uid=gv.group_uid order by gv.ccds_status_val_uid, cu.ccds_uid";
# get ccds -> xref transcript_id ensembl_stable_id{CCDS1} = ENST00001
# get ccds -> internal transcript_id ccds_to_internal_id(CCDS1} = 12345
$sql='select x.dbprimary_acc, ox.ensembl_id from xref x, object_xref ox, external_db e where x.xref_id = ox.xref_id and x.external_db_id = e.external_db_id and e.db_name like ?';