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Insert text between delimiter

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# 1  
Old 03-06-2008
Insert text between delimiter
Can someone help me on this?

I'm creating an Insert stmt script but Oracle does not accept blanks values. How can I insert the word null between two commas? I'm guessing awk or sed.

Is there a good post or site with easy to understand info on awk and sed? I'm really new to unix scripts Smilie

Thanks.
# 2  
Old 03-06-2008
Quote:
Originally Posted by ystee
Can someone help me on this?

I'm creating an Insert stmt script but Oracle does not accept blanks values. How can I insert the word null between two commas? I'm guessing awk or sed.

Is there a good post or site with easy to understand info on awk and sed? I'm really new to unix scripts Smilie

Thanks.
Show how the input and what the output looks like.
# 3  
Old 03-06-2008
Input and output sample
Input: INSERT into caps.prodfile VALUES ('MK992','',,,,'','','');
Output: INSERT into caps.prodfile VALUES ('MK992','',NULL,NULL,NULL,'','','');

I've tried the following

sed 's/,,/,NULL,/g' prodfile.sql

but it only inserts the first NULL in each line.
And there are several hundred Insert statements in a file. Thanks.
# 4  
Old 03-06-2008
Quote:
Originally Posted by ystee
Input: INSERT into caps.prodfile VALUES ('MK992','',,,,'','','');
Output: INSERT into caps.prodfile VALUES ('MK992','',NULL,NULL,NULL,'','','');

I've tried the following

sed 's/,,/,NULL,/g' prodfile.sql

but it only inserts the first NULL in each line.
And there are several hundred Insert statements in a file. Thanks.
Code:
awk -F"," '{
   for (i = 1; i <= NF; ++i) {
      if ($i == "")
         printf("NULL,")
      else {
         if (i < NF)
            printf("%s,", $i)
         else
            printf("%s\n", $i)
      }
   }
}' file

# 5  
Old 03-06-2008
Java
There's sure to be a way to do this in sed, but I'm pretty poor with sed so here's some (really ugly) perl:

Code:
#!/usr/bin/perl -w
while (<>) {
  while ($_ =~ s/,,/,NULL,/) { print "" }
  print $_;
}

# 6  
Old 03-06-2008
Thanks
The code works perfectly Smilie
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