Hi, I need help with the join command
I have 2 files that I want to join on multiple fields.
I want to return all records from file 1
I also want empty fields in my joined file if there isn't a match in file 2
I have already sorted them so I know they are in the same order.
If I only had to match file1 field 3 to file2 field 1 this would work perfectly
I get output with the empty fields if no matching record exists.
But.. I need to match on multiple fields and I have no idea how to do that.
Thanks!
Last edited by Scott; 08-11-2010 at 06:53 PM..
Reason: Please use code tags
Is it possible to do a join on multiple fields of two files? I am trying to do something like join -t, -1 2,3 -2 2,3 -o 2.1,2.2,2.3,1.3 filea fileb
I want the join to be on columns 2 and 3 of filea and columns 2 and 3 of fileb.
What is hapenning is that the second file that I want to do the join... (1 Reply)
I've looked at the join command which is able to perform what I need on two rows with a common field, however if I have more than two rows I need to join all of them.
Thus I have one file with multiple rows to be joined on an index number:
1 randomtext1
2 rtext2
2 rtext3
3 rtext4
3 rtext5... (5 Replies)
example sql:
select a.a1,b.b1,c.c1,d.d1,e.e1
from a
left outer join b on a.x=b.x
left outer join c on b.y=c.y
left outer join d on d.z=a.z
inner join a.t=e.t
I know how single outer or inner join works in sql.
But I don't really understand when there are multiple of them.
can... (0 Replies)
Hello,
My apologies if this has been posted elsewhere, I have had a look at several threads but I am still confused how to use these functions. I have two files, each with 5 columns:
File A: (tab-delimited)
PDB CHAIN Start End Fragment
1avq A 171 176 awyfan
1avq A 172 177 wyfany
1c7k A 2 7... (3 Replies)
My input is as below:
1|2|3|a02 test|303
2|2|4|1002 a05 ind|303
4|3|5|ind|30
Output
1|2|3|a02test|303
2|2|4|a05ind|303
4|3|5|ind|30
I used command:
I am getting above output. Is there any simple way using awk to acheive this.
Thanks.
Please use code tags! (6 Replies)
Hi,
I have 20 tab delimited text files that have a common column (column 1). The files are named GSM1.txt through GSM20.txt. Each file has 3 columns (2 other columns in addition to the first common column).
I want to write a script to join the files by the first common column so that in the... (5 Replies)
Hi All,
I am looking for an awk script to do the following
Join the fields together only if the first 4 fields are same.
Can it be done with join function in awk??
a,b,c,d,8,,,
a,b,c,d,,7,,
a,b,c,d,,,9,
a,b,p,e,8,,,
a.b,p,e,,9,,
a,b,p,z,,,,9
a,b,p,z,,8,,
desired output:
... (1 Reply)
Dear all,
I 'd like to ask a question. I have two datasets: a.txt (only has one filed, call 'SNP'), b.txt( has thousands of fields, 1st field call 'SNP').
a.txt:
rs9527
rs318567
rs12376
...
b.txt:
rs167893 1 2 0 2 1 2 ...
rs318567 2 0 2 1 2 0 ...
rs12376 0 2 0 2 1 2 ...
I... (2 Replies)
I have a file with two fields in it delimited by a comma. Some of the first fields are duplicates. I am trying to eliminate any duplicate records in the first field, and combine the second fields in the output file.
For example, if the input is:
Jane,group=A
Bob,group=A
Bob,group=D... (3 Replies)
Hello all,
I want to join 2 tabbed files on the first 2 fields, and filling the missing values with 0. The 3rd column in each file is constant for the entire file.
file1
12658699 ST5 XX2720 0 1 0 1
53039541 ST5 XX2720 1 0 1.5 1
file2 ... (6 Replies)
Discussion started by: sheetalk
6 Replies
LEARN ABOUT V7
join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If file1 is `-', the standard
input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Fields are normally separated by blank, tab or newline. In this case, multiple separators count as one, and leading separators are dis-
carded.
These options are recognized:
-an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-e s Replace empty output fields by string s.
-jn m Join on the mth field of file n. If n is missing, use the mth field in each file.
-o list
Each output line comprises the fields specifed in list, each element of which has the form n.m, where n is a file number and m is a
field number.
-tc Use character c as a separator (tab character). Every appearance of c in a line is significant.
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.
The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.
JOIN(1)