cd  c1  c2  d1
----------------
aa  23  681 4850
aa  23  942 4850
aa  28  944 4881
aa  28  221 4850
bb  46  443 9082
cc  77  171 2831
cc  77  272 2831
dd  18  798 5993
xx  71  166 8755
xx  71  482 3818
xx  71  565 7598
xx  71  603 7246
xx  71  649 4293
xx  71  681 7321
xx  71  250 7453
xx  22  276 3818
xx  22  107 8755
yy  28  143 5802
zz  33  624 3205
zz  33  767 1532
zz  33  372 3205
zz  33  679 3838

SELECT cd, c1, c2, d1
FROM test_data
WHERE cd IN (SELECT cd FROM test_data group by cd having count(cd) > 3)