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Joining 3 fields of a fiile

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Top Forums Shell Programming and Scripting Joining 3 fields of a fiile
# 8  
Old 12-31-2007
awk
Hi,

Awk should be ok for you.

a:
Code:
20071121|12|Mohit|DAV
20071222|13|Dev|MRSD
20071011|14|Rajan|ST
20071011|15|Lali|OTH

b:
Code:
12|KKP|Pun|Mohit
14|FDK|Pas|Abhi
15|SAD|Hp|Lali

out:
Code:
12|Mohit|20071121|DAV|KKP|Pun
15|Lali|20071011|OTH|SAD|Hp

code:
Code:
nawk 'BEGIN{FS="|"}
NR==FNR {
temp1=sprintf("%s|%s",$2,$3)
t[temp1]=sprintf("%s|%s|%s|%s",$2,$3,$1,$4)}

NR!=FNR {
temp2=sprintf("%s|%s",$1,$4)
if (t[temp2])
printf("%s|%s|%s\n",t[temp2],$2,$3)
}
' a b

# 9  
Old 01-02-2008
how to use "where" condition?
if i want to get the row in which a particular condition is req,
than how can i do it?
Like in the above given file if i want to extract only the row where second column =12 in the first file.
Please help me as soon as possible.
Thanks
# 10  
Old 01-04-2008
Code:
column_f1=2
value=12

awk 'FNR == NR && $'${column_f1}' == '${value}' { n=FR;print;break }
/'${value}'/ FNR == n {print}' FS=\| f1 f2
20071121|12|Mohit|DAV

Anyway , you can achieve your goal using join.
# 11  
Old 06-17-2008
Could you please explain the code?
Hi,

I checked your code and it works great, but I can understand it very well...


nawk 'BEGIN{FS="|"}
NR==FNR { <<< what does this section do? I thought it meant when the combination of fields is found then do whatever.... but the print is in the next section Smilie
temp1=sprintf("%s|%s",$2,$3)
t[temp1]=sprintf("%s|%s|%s|%s",$2,$3,$1,$4)}

NR!=FNR {
temp2=sprintf("%s|%s",$1,$4)
if (t[temp2])
printf("%s|%s|%s\n",t[temp2],$2,$3)
}
' a b

I'm changing some values to try to understand it better but I'm still confused...

Thanks,

Quote:
Originally Posted by summer_cherry
Hi,

Awk should be ok for you.

a:
Code:
20071121|12|Mohit|DAV
20071222|13|Dev|MRSD
20071011|14|Rajan|ST
20071011|15|Lali|OTH

b:
Code:
12|KKP|Pun|Mohit
14|FDK|Pas|Abhi
15|SAD|Hp|Lali

out:
Code:
12|Mohit|20071121|DAV|KKP|Pun
15|Lali|20071011|OTH|SAD|Hp

code:
Code:
nawk 'BEGIN{FS="|"}
NR==FNR {
temp1=sprintf("%s|%s",$2,$3)
t[temp1]=sprintf("%s|%s|%s|%s",$2,$3,$1,$4)}

NR!=FNR {
temp2=sprintf("%s|%s",$1,$4)
if (t[temp2])
printf("%s|%s|%s\n",t[temp2],$2,$3)
}
' a b
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