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Full Discussion: ksh script to create a generic csv file from different source formats
Top Forums Shell Programming and Scripting ksh script to create a generic csv file from different source formats Post 302454203 by Leedor on Friday 17th of September 2010 11:02:32 AM
Old 09-17-2010
ksh script to create a generic csv file from different source formats
Hi all,

I have a requirement to create a "superset" file out of a number of different sources with some different and some same columns.

We intend to have a manually updateable SuperSetCols.csv which would look like
Code:
"ColA","ColB","ColC","ColD","ColE","ColF","ColG"

so someday we may add ColH ColI etc We will only ever add to the end of the list as new columns are required.

Our sources look like this:
Code:
File0.csv
"ColA","ColB","ColC"
"Dat001","Dat002","Dat003"
"Dat011","Dat012","Dat013"
 
File1.csv
"ColA","ColB","ColD"
"Dat101","Dat102","Dat104"
"Dat111","Dat112","Dat114"
 
File2.csv
"ColD","ColE","ColF","ColG"
"Dat204","Dat205","Dat206","Dat207"
"Dat214","Dat215","Dat216","Dat217"

Our intention is to basically fill the gaps where necessary. So File0 needs columns D-G, File1 C & E-G and File2 A-C. The column names are expected to match identically and again remain in order as per the superset.

We would like to output the files to a 'Super' directory as follows:
Code:
Super/File0.csv
"ColA","ColB","ColC","ColD","ColE","ColF","ColG"
"Dat001","Dat002","Dat003","","","",""
"Dat011","Dat012","Dat013","","","",""
 
Super/File1.csv
"ColA","ColB","ColC","ColD","ColE","ColF","ColG"
"Dat101","Dat102","","Dat104","","",""
"Dat111","Dat112","","Dat114","","",""
 
Super/File2.csv
"ColA","ColB","ColC","ColD","ColE","ColF","ColG"
"","","","Dat204","Dat205","Dat206","Dat207"
"","","","Dat214","Dat215","Dat216","Dat217"

So that a different process will be able to concatenate them when it is ready and read them as one common file structure:

Code:
"ColA","ColB","ColC","ColD","ColE","ColF","ColG"
"Dat001","Dat002","Dat003","","","",""
"Dat011","Dat012","Dat013","","","",""
"Dat101","Dat102","","Dat104","","",""
"Dat111","Dat112","","Dat114","","",""
"","","","Dat204","Dat205","Dat206","Dat207"
"","","","Dat214","Dat215","Dat216","Dat217"

Many thanks in advance to all who reply, I would greatly appreciate anyone's help on this!

Lee
 

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