Question

I have a table like this

    id     userid     cc    cop    
    1       23        0.5   0.9
    2       23        0.5   0.9
    3       29        2.6   9.4
    4       75        4.8   8.9
    5       29        2.6   9.4
    6       45        6.7   9.0

I want all the roles such that cc and cop are distinct 1.e the result is supposed to be
something like this

    id     userid     cc    cop    
    1       23        0.5   0.9
    3       29        2.6   9.4
    4       75        4.8   8.9
    6       45        6.7   9.0

i want of any rows that has cc,cop,userid the same only one should be selected
pseudocode: select * from table where userid,cc,cop are distinct from the result.

Answer 1

Maybe you could try something like this

SELECT MIN(id), userid, cc, cop 
FROM table 
GROUP BY userid, cc, cop;

It will select the first id of each occurence.