Aggregate Analysis of a CSV file
I work with a lot of large CSV files, sometimes upwards of 10 GB, upon which I need to do aggregate analysis (e.g. Min and Max length of data in a column, is every field in a column numeric, is every field in a column in an ISO date format).
With smaller files, I copy and paste into Excel, but once things approach 100 MB of CSV data, Excel can become unwieldy.
Let me try an example.
Say I have a CSV file that contains the following.
FirstName,LastName,BirthDate,Caseload
Bob,Jones,1966-10-22,38
Alice,Smith,1971-03-10,41
Darren,Wilson,1962-04-18,49
The desired output would be another CSV file like this.
column_name,min,max,all_numeric,all_dates
FirstName,3,6,N,N
LastName,5,6,N,N
BirthDate,10,10,N,Y
Caseload,2,2,Y,N
It would have to scale and work with a 10 GB CSV file. I'm thinking a script like Python is the way, if I really want it to be customized with precisely this output. However, a tool, even one I have to pay for, would be desirable. I just don't know what to call such a tool to search for it, if such a tool exists.
python csv
asked Dec 13 '18 at 1:29
Kennah
1215
add a comment |
I work with a lot of large CSV files, sometimes upwards of 10 GB, upon which I need to do aggregate analysis (e.g. Min and Max length of data in a column, is every field in a column numeric, is every field in a column in an ISO date format).
With smaller files, I copy and paste into Excel, but once things approach 100 MB of CSV data, Excel can become unwieldy.
Let me try an example.
Say I have a CSV file that contains the following.
FirstName,LastName,BirthDate,Caseload
Bob,Jones,1966-10-22,38
Alice,Smith,1971-03-10,41
Darren,Wilson,1962-04-18,49
The desired output would be another CSV file like this.
column_name,min,max,all_numeric,all_dates
FirstName,3,6,N,N
LastName,5,6,N,N
BirthDate,10,10,N,Y
Caseload,2,2,Y,N
It would have to scale and work with a 10 GB CSV file. I'm thinking a script like Python is the way, if I really want it to be customized with precisely this output. However, a tool, even one I have to pay for, would be desirable. I just don't know what to call such a tool to search for it, if such a tool exists.
python csv
asked Dec 13 '18 at 1:29
Kennah
1215
You might want to have a look at XSV - a command-line CSV toolkit.
– Mike Fitzpatrick
Dec 13 '18 at 3:26
add a comment |
I work with a lot of large CSV files, sometimes upwards of 10 GB, upon which I need to do aggregate analysis (e.g. Min and Max length of data in a column, is every field in a column numeric, is every field in a column in an ISO date format).
With smaller files, I copy and paste into Excel, but once things approach 100 MB of CSV data, Excel can become unwieldy.
Let me try an example.
Say I have a CSV file that contains the following.
FirstName,LastName,BirthDate,Caseload
Bob,Jones,1966-10-22,38
Alice,Smith,1971-03-10,41
Darren,Wilson,1962-04-18,49
The desired output would be another CSV file like this.
column_name,min,max,all_numeric,all_dates
FirstName,3,6,N,N
LastName,5,6,N,N
BirthDate,10,10,N,Y
Caseload,2,2,Y,N
It would have to scale and work with a 10 GB CSV file. I'm thinking a script like Python is the way, if I really want it to be customized with precisely this output. However, a tool, even one I have to pay for, would be desirable. I just don't know what to call such a tool to search for it, if such a tool exists.
python csv
asked Dec 13 '18 at 1:29
Kennah
1215
I work with a lot of large CSV files, sometimes upwards of 10 GB, upon which I need to do aggregate analysis (e.g. Min and Max length of data in a column, is every field in a column numeric, is every field in a column in an ISO date format).
With smaller files, I copy and paste into Excel, but once things approach 100 MB of CSV data, Excel can become unwieldy.
Let me try an example.
Say I have a CSV file that contains the following.
FirstName,LastName,BirthDate,Caseload
Bob,Jones,1966-10-22,38
Alice,Smith,1971-03-10,41
Darren,Wilson,1962-04-18,49
The desired output would be another CSV file like this.
column_name,min,max,all_numeric,all_dates
FirstName,3,6,N,N
LastName,5,6,N,N
BirthDate,10,10,N,Y
Caseload,2,2,Y,N
It would have to scale and work with a 10 GB CSV file. I'm thinking a script like Python is the way, if I really want it to be customized with precisely this output. However, a tool, even one I have to pay for, would be desirable. I just don't know what to call such a tool to search for it, if such a tool exists.
python csv
python csv
asked Dec 13 '18 at 1:29
Kennah
1215
asked Dec 13 '18 at 1:29
Kennah
1215
asked Dec 13 '18 at 1:29
Kennah
1215
asked Dec 13 '18 at 1:29
Kennah
1215
asked Dec 13 '18 at 1:29
Kennah
1215
1215
You might want to have a look at XSV - a command-line CSV toolkit.
– Mike Fitzpatrick
Dec 13 '18 at 3:26
add a comment |
You might want to have a look at XSV - a command-line CSV toolkit.
– Mike Fitzpatrick
Dec 13 '18 at 3:26
You might want to have a look at XSV - a command-line CSV toolkit.
– Mike Fitzpatrick
Dec 13 '18 at 3:26
You might want to have a look at XSV - a command-line CSV toolkit.
– Mike Fitzpatrick
Dec 13 '18 at 3:26
add a comment |
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You might want to have a look at XSV - a command-line CSV toolkit.
– Mike Fitzpatrick
Dec 13 '18 at 3:26