Eu tenho um arquivo dat:
> head file.dat
"201731","474","1000522966","0.2670"
"201732","474","1000522966","0.3163"
"201733","474","1000522966","0.3902"
"201734","474","1000522966","0.4479"
"201735","474","1000522966","0.5960"
"201736","47...
08.09.2017 / 05:03