test_db=# select address from test_table;

58/171-G, RAJAPURAM,\r                                                                                                                                                                                                                                                                                                                                                                                                              +
PALANIAPPA NAGAR,\r                                                                                                                                                                                                                                                                                                                                                                                                                 +
SALEM
TS.No.5823,SANTHANATHAPURAM FOURTH STREET\r                                                                                                                                                                                                                                                                                                                                                                                         +

 

solution
test_db=# update test_table set address= regexp_replace(address, E'[\\n\\r]+’, ‘ ‘, ‘g’);

test_db=# select address from test_table;

58/171-G, RAJAPURAM,

PALANIAPPA NAGAR,

SALEM TS.No.5823,SANTHANATHAPURAM FOURTH STREET

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