Hi all

just like we do group by in SQL for removing duplicate keys, i need to read a file with content as shown below 
2010-01-01_audio,4
2010-01-01_text,5
2010-01-01_audio,6
2010-01-01_video,7
2010-01-02_audio,8
2010-01-02_text,6
2010-01-02_video,66
2010-01-02_text,45

[download]
Now I need to have one record of 2010-01-01_audio with the value = 4+6. and so on.The record shud look like

2010-01-01_audio,10

So, in short my output shud look like
2010-01-01_audio,10
2010-01-01_text,5
2010-01-01_video,7
2010-01-02_audio,8
2010-01-02_text,51
2010-01-02_video,66

[download]
I heard that using hash u cn do it but im not familiar with hash, and if i use the conventional way of using reading the file and foreach record, match it and the write it. but it is not possible to get the expected result.

PS: I cannot provide you with sample code as even I am not able to apply the logic.

any help would be grateful

Thanks
AvantA

In reply to Need help with using Hash by avanta

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