awk更新记录

Question

I have data in a text file:

Customer:HDB:Price:Left:total
Ted 1:rm4:34:197:101

I'm trying to update the latest record for left and total to the database. Why doesn't this expression work?

awk -F : -v OFS=: -v customer=$customer-v hdb=$hdb \
   -v left=$left -v total=$total \
   '$1==customer && $2==hdb {`$4=left $5=total;`}1' file

Answer 1

1) you forgot ; here:

$4=left; $5=total;

2) space required here:

customer=$customer -v

3) `` not required here:

{$4=left; $5=total;}

This should work:

awk -F : -v OFS=: -v customer="$customer" -v hdb="$hdb" -v left="$left" \
  -v total="$total" '$1==customer && $2==hdb { $4=left; $5=total } 1' file