Table des_dr2.coverage seems to have a different number of rows to what is reported both in DES DR2 paper and the same table at the NCSA server.
datalab: select count(*) from des_dr2.coverage --> 25499949
ncsa: SELECT count(*) FROM DR2_COVERAGE --> 25239595 (as reported in the paper)
Also this query, for example:
select hpix_4096 from des_dr2.coverage where hpix_4096 = 67108876
returns five entries (one per band?) when it should return only one (this is the expected behavior).