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How to only display lines where a field has the highest number?

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Top Forums Shell Programming and Scripting How to only display lines where a field has the highest number?
# 1  
Old 08-05-2010
Question How to only display lines where a field has the highest number?
Hello

Wondering if anybody can advise me how I can sort the below file so it only displays lines with the latest versions of an object? As you'll see some of the scripts listed in my file have more than one version number (version number is after the file extension). E.g. cdm_bri.pkb has versions 1 - 6 listed I only want to see the line showing verson 6. I've searched the forum for similar threads, but haven't been able to find what I'm looking for.

Many thanks
Glyn

Code:
 
breach_repetitions_pop.sql-1           85820       SRDP_BREACHES/1
breach_repetitions_pop.sql-2           86628       SRDP_BREACHES/1
breach_repetitions.tab-1               85820       SRDP_BREACHES/1
breach_repetitions.tab-2               86628       SRDP_BREACHES/1
breach_reporting_orgs_pop.sql-1        85820       SRDP_BREACHES/1
breach_reporting_orgs_pop.sql-2        86628       SRDP_BREACHES/1
breach_reporting_orgs.tab-1            85820       SRDP_BREACHES/1
breach_reporting_orgs.tab-2            86628       SRDP_BREACHES/1
breach_severities_pop.sql-1            85820       SRDP_BREACHES/1
breach_severities_pop.sql-2            86628       SRDP_BREACHES/1
breach_severities.tab-1                85820       SRDP_BREACHES/1
breach_severities.tab-2                86628       SRDP_BREACHES/1
breaches_br_iu.trg-1                   85820       SRDP_BREACHES/1
breaches_br_iu.trg-2                   86628       SRDP_BREACHES/1
breaches_fk.con-2                      85820       SRDP_BREACHES/1
breaches_fk.con-3                      86628       SRDP_BREACHES/1
breaches_qry_api_pkg.pkb-3             85821       SRDP_BREACHES/1
breaches_qry_api_pkg.pkb-4             87266       SRDP_BREACHES/1
breaches_qry_api_pkg.pks-3             85821       SRDP_BREACHES/1
breaches_qry_api_pkg.pks-4             87266       SRDP_BREACHES/1
breaches_upd_api_pkg.pkb-1             87266       SRDP_BREACHES/1
breaches_upd_api_pkg.pks-1             87266       SRDP_BREACHES/1
breaches.tab-2                         85820       SRDP_BREACHES/1
breaches.tab-3                         86628       SRDP_BREACHES/1
cdm_bes.pkb-3                          85821       SRDP_BREACHES/1
cdm_bes.pkb-4                          86589       SRDP_BREACHES/1
cdm_bes.pkb-5                          87101       SRDP_BREACHES/1
cdm_bes.pkb-6                          87152       SRDP_BREACHES/1
cdm_bes.pks-3                          85821       SRDP_BREACHES/1
cdm_bes.pks-4                          86589       SRDP_BREACHES/1
cdm_bilp.pkb-1                         85821       SRDP_BREACHES/1
cdm_bilp.pkb-2                         86589       SRDP_BREACHES/1
cdm_bilp.pkb-3                         87017       SRDP_BREACHES/1
cdm_bilp.pks-1                         85821       SRDP_BREACHES/1
cdm_bilp.pks-2                         86589       SRDP_BREACHES/1
cdm_bre.pkb-3                          85821       SRDP_BREACHES/1
cdm_bre.pkb-4                          87160       SRDP_BREACHES/1
cdm_bre.pkb-5                          87171       SRDP_BREACHES/1
cdm_bre.pks-3                          85821       SRDP_BREACHES/1
cdm_bre.pks-4                          87171       SRDP_BREACHES/1
cdm_bri.pkb-1                          85821       SRDP_BREACHES/1
cdm_bri.pkb-2                          87017       SRDP_BREACHES/1
cdm_bri.pkb-3                          87174       SRDP_BREACHES/1
cdm_bri.pkb-4                          87180       SRDP_BREACHES/1
cdm_bri.pkb-5                          87184       SRDP_BREACHES/1
cdm_bri.pkb-6                          87260       SRDP_BREACHES/1

# 2  
Old 08-05-2010
Code:
awk -F'[ -]' ' { if(!a[$1] || a[$1]<$2){ a[$1]=$2;arr[$1]=$0 } } END { for(i in arr){ print arr[i] } } ' file

This User Gave Thanks to anbu23 For This Post:
Glyn_Mo
# 3  
Old 08-05-2010
Thanks, that's doing exactly what I'm wanting!

I need to read up a bit more on this though. I take it, I need to be looking arrays in AWK?

Many thanks
Glyn
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