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ksh script to create a generic csv file from different source formats

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# 1  
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
# 2  
Old 09-17-2010
First, you'll have to make a list of column names. It can be done like
Code:
head -n1 file*.csv | tr ',' '\n' | sort -u

For the following, please wait...
But i think perl will do the best for your needs, while it handles map arrays.
Last edited by frans; 09-17-2010 at 01:15 PM..
# 3  
Old 09-18-2010
Generate title file:
Code:
awk 'FNR==1' File*.csv |tr "," "\n" |sort -u > title.txt

"ColA"
"ColB"
"ColC"
"ColD"
"ColE"
"ColF"
"ColG"

create the subfolder Super

Code:
mkdir Super

Get the result (but each file has comma in the end of each line).

Code:
awk -F , '
NR==FNR {title[FNR]=$1;b[$1]=FNR;n=FNR;next} 
FNR==1 {   
           for (i=1;i<=n;i++) 
              { 
                  printf title[i] FS > "Super/" FILENAME
                  sign[i]=0
               }
           printf "\n" > "Super/" FILENAME
           for (i=1;i<=NF;i++)
              sign[b[$i]]=1
           next
       }
{    
     split($0,x,",")
     for (i=1;i<=n;i++)
         { 
           printf (sign[i]=="1")? x[++j] FS:"\"\"" FS > "Super/" FILENAME
         }
     printf "\n" > "Super/" FILENAME
     j=0
}
' title.txt *.csv

$ cat Super/File2.csv
"ColA","ColB","ColC","ColD","ColE","ColF","ColG",
"","","","Dat204","Dat205","Dat206","Dat207",
"","","","Dat214","Dat215","Dat216","Dat217",

If you need clean the end comma from each line

Code:
for file in Super/File*.csv
do
  sed 's/,$//' $file > tmp
  mv tmp $file
done

if your sed support -i option:
Code:
for file in Super/File*.csv
do
  sed -i 's/,$//' $file > tmp
done



---------- Post updated at 12:28 AM ---------- Previous update was at 12:22 AM ----------
Quote:
Originally Posted by Leedor

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"

Code:
awk 'NR==1||FNR>1' Super/*.csv

This User Gave Thanks to rdcwayx For This Post:
Leedor
# 4  
Old 09-20-2010
Thankyou!
Many thanks rdcwayx.

Have tested your code quite thoroughly this morning and it seems to work perfectly for our needs.

Much appreciated!
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