It's not clear what you want done: you do not define similarity.

FWIW, the provided data can be grouped using only column k, by a simple floor( k / 100.0 ) * 100 expression. How can more be deduced from your data? 

select mm, m , p , k , y , my, r , s , o , c, whatness
from t
order by 
   floor( k / 100.0 ) * 100
 , k
;

 mm |  m  |   p   |   k    | y  | my |   r    | s  |   o    | c | what
+ness
----+-----+-------+--------+----+----+--------+----+--------+---+-----
+------
 84 | 250 | 16700 |   4900 | 13 |  0 | 102124 | 23 |      0 | 0 | * si
+milar
 84 | 250 | 16700 |   4900 | 13 |  6 | 102124 |  3 |      0 | 5 | * si
+milar
 84 | 250 | 17290 |   4905 | 13 |  6 | 102124 |  1 |   3687 | 0 | * si
+milar
 84 | 250 | 17290 |   4905 | 13 |  6 | 102124 | 22 |   3687 | 2 | * si
+milar
 84 | 250 | 17290 |   4905 | 13 |  6 | 102124 |  4 |   3687 | 2 | * si
+milar
 84 | 250 | 17290 |   4910 | 13 |  6 | 102124 |  3 |   3687 | 2 | * si
+milar
 84 | 250 | 10900 |  46423 | 11 |  5 |  52012 |  3 |    485 | 1 | # si
+milar
 84 | 250 | 10200 |  46423 | 11 |  5 |  52012 | 23 |    485 | 1 | # si
+milar
 84 | 250 | 10900 |  46423 | 11 |  5 |  52012 |  8 |    485 | 0 | # si
+milar
 84 | 250 |  9900 |  46423 | 11 |  5 |  52012 | 22 |    485 | 1 | # si
+milar
 84 | 250 | 14380 |  49501 | 11 |  5 |      0 |  1 | 140427 | 0 | § si
+milar
 84 | 250 | 13980 |  49501 | 11 |  5 |  31751 |  6 | 140427 | 0 | § si
+milar
 84 | 250 | 13980 |  49501 | 11 |  5 |  31751 |  3 | 140427 | 1 | § si
+milar
 84 | 250 | 14380 |  49501 | 11 |  5 |      0 | 23 | 140427 | 1 | § si
+milar
 84 | 250 | 14390 |  49501 | 11 |  5 |      0 | 22 | 140427 | 1 | § si
+milar
 84 | 250 |  5490 | 150000 |  7 |  0 |      0 | 23 |  54964 | 0 | & si
+milar
 84 | 250 |  5300 | 150000 |  7 | 11 |  31609 |  6 |  54964 | 0 | & si
+milar
 84 | 250 |  5200 | 150000 |  7 | 11 |  31609 |  8 |  54964 | 3 | & si
+milar
(18 rows)

[download]

In reply to Re: Find similar records based on multiple column with multiple criteria by erix
in thread Find similar records based on multiple column with multiple criteria by ssc37

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