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BEGIN {FS=" *; *"} 
{ a[$1 ";" $3]=a[$1 ";" $3] ";" $2 } 
END {for (k in a) {print k  a[k]}}

Success #stdin #stdout 0.01s 4276KB

stdin

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05 ; 47.89 ; 971
05 ; 49.23 ; 971
05 ; 1.44 ; 971
10 ; 61.42 ; 508
10 ; 37.40 ; 508
10 ; 0.39 ; 508
15 ; 45.09 ; 173
15 ; 52.60 ; 173
15 ; 0.00 ; 173

stdout

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05;971;47.89;49.23;1.44
10;508;61.42;37.40;0.39
15;173;45.09;52.60;0.00

https://ideone.com/r44wjm

language:

AWK (gawk 4.2.1)

created:

visibility:

public

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