JOIN(1)                       Cac cau l<?>nh                           JOIN(1)

TEN
       join - join lines of two files on a common field

TOM T<?>T
       join [TUY_CH<?>N]<?> T<?>P_TIN1 T<?>P_TIN2

MO T<?>
       V<?>i m<?>i c<?>p dong van b<?>n d<?>u vao v<?>i tru<?>ng d<?> gia
       nh<?>p gi<?>ng nhau, ghi m<?>t dong van b<?>n ra d<?>u ra tieu chu<?>n.
       Tru<?>ng d<?> gia nh<?>p m<?>c d<?>nh la d<?>u tien, gi<?>i h<?>n b<?>i
       kho<?>ng tr<?>ng.

       Khi T<?>P_TIN1 ho<?>c T<?>P_TIN2 (khong ph<?>i c<?> hai) la "-", thi
       d<?>c t<?> d<?>u vao tieu chu<?>n.

       -a T<?>P_TIN_S<?>
              in ra dong khong co c<?>p t<?> t<?>p tin s<?> T<?>P_TIN_S<?> ,
              <?> do T<?>P_TIN_S<?>  la 1 ho<?>c 2, tuong <?>ng v<?>i
              T<?>P_TIN_S<?> 1 ho<?>c T<?>P_TIN_S<?> 2

       -e STRING
              replace missing (empty) input fields with STRING; I.e., missing
              fields specified with '-12jo' options

       -i, --ignore-case
              b<?> qua s<?> khac nhau v<?> ki<?>u ch<?> HOA/thu<?>ng khi so
              sanh cac tru<?>ng

       -j TRU<?>NG
              tuong duong v<?>i "-1 TRU<?>NG -2 TRU<?>NG"

       -o D<?>NH_D<?>NG
              tuan theo D<?>NH_D<?>NG khi t<?>o ra dong k<?>t qu<?>

       -t KY_T<?>
              dung KY_T<?> lam ky t<?> phan chia tru<?>ng dua vao va k<?>t
              qu<?> ra

       -v T<?>P_TIN_S<?>
              gi<?>ng nhu "-a T<?>P_TIN_S<?>", nhung b<?> di cac dong nh<?>p
              da n<?>i l<?>i

       -1 TRU<?>NG
              n<?>i l<?>i <?> TRU<?>NG nay c<?>a t<?>p tin 1

       -2 TRU<?>NG
              n<?>i l<?>i <?> TRU<?>NG nay c<?>a t<?>p tin 2

       --check-order
              ki<?>m tra d<?> li<?>u d<?>u vao du<?>c s<?>p x<?>p dung, th<?>m
              chi n<?>u m<?>i dong d<?>u vao d<?>u co th<?> k<?>t doi du<?>c

       --nocheck-order
              khong ki<?>m tra xem d<?>u vao da x<?>p x<?>p dung chua

       --header
              x<?> ly dong d<?>u c<?>a t<?>ng t<?>p tin la dong d<?>u
              tru<?>ng, in ra ma khong th<?> k<?>t doi

       -z, --zero-terminated
              b<?> phan tach dong la NUL, khong ph<?>i ky t<?> dong m<?>i

       --help hi<?>n th<?> tr<?> giup nay r<?>i thoat

       --version
              dua ra thong tin phien b<?>n r<?>i thoat

       Tr<?> phi dua ra tuy ch<?>n "-t KY_T<?>", ky t<?> tr<?>ng nao di
       tru<?>c s<?> phan cach cac tru<?>ng va b<?> b<?> qua, khong thi thi
       phan cach b<?>i KY_T<?>. M<?>i TRU<?>NG du<?>c danh s<?> va b<?>t d<?>u
       d<?>m t<?> 1. D<?>NH_D<?>NG la m<?>t ho<?>c vai d<?>nh d<?>ng phan cach
       b<?>i m<?>t hay hon kho<?>ng tr<?>ng ho<?>c d<?>u ph<?>y, v<?>i c<?>u
       truc "T<?>P_TIN_S<?>.TRU<?>NG" ho<?>c "0". D<?>NH_D<?>NG k<?>t xu<?>t
       m<?>c d<?>nh dua ra tru<?>ng d<?> n<?>i l<?>i, nh<?>ng tru<?>ng con
       l<?>i trong T<?>P_TIN1, cac tru<?>ng con l<?>i trong T<?>P_TIN2, c<?>
       phan cach b<?>i KY_T<?>. N<?>u D<?>NH_D<?>NG la t<?> khoa "auto", th<?>
       thi dong d<?>u tien c<?>a m<?>i t<?>p tin du<?>c xac d<?>nh b<?>ng s<?>
       tru<?>ng xu<?>t ra b<?>i m<?>i dong.

       Quan tr<?>ng: T<?>P_TIN1 va T<?>P_TIN2 ph<?>i du<?>c s<?>p x<?>p theo
       vung n<?>i l<?>i. V.d. dung "sort -k 1b,1" n<?>u join khong co tuy
       ch<?>n. hay s<?> d<?>ng "join -t "'" n<?>u sort(1) khong co tuy ch<?>n.
       Ghi chu: vi<?>c so sanh tuy theo quy t<?>c c<?>a "LC_COLLATE". N<?>u
       d<?>u vao khong ph<?>i du<?>c s<?>p x<?>p va m<?>t s<?> dong nao do
       khong n<?>i l<?>i du<?>c, m<?>t thong di<?>p c<?>nh bao s<?> du<?>c
       hi<?>n th<?>.

TAC GI<?>
       Vi<?>t b<?>i Mike Haertel.

THONG BAO L<?>I
       Tr<?> giup tr<?>c tuy<?>n GNU coreutils:
       <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>

B<?>N QUY<?>N
       Copyright (C) 2023 Free Software Foundation, Inc.  Gi<?>y phep GPL pb3+
       : Gi<?>y phep Cong c<?>ng GNU phien b<?>n 3 hay sau
       <https://gnu.org/licenses/gpl.html>.
       Day la ph<?>n m<?>m t<?> do: b<?>n co quy<?>n s<?>a d<?>i va phat hanh
       l<?>i no. KHONG CO B<?>O HANH GI C<?>, v<?>i di<?>u khi<?>n du<?>c phap
       lu<?>t cho phep.

XEM THEM
       comm(1), uniq(1)

       Tai li<?>u d<?>y d<?> co t<?>i:
       <https://www.gnu.org/software/coreutils/join>
       ho<?>c s<?>n co n<?>i b<?> thong qua: info '(coreutils) join
       invocation'

D<?>CH
       B<?>n d<?>ch ti<?>ng Vi<?>t c<?>a trang hu<?>ng d<?>n nay do

       th<?>c hi<?>n.

       B<?>n d<?>ch nay la Tai li<?>u Mi<?>n phi; d<?>c Gi<?>y phep Cong
       c<?>ng GNU Phien b<?>n 3 <https://www.gnu.org/licenses/gpl-3.0.html>
       ho<?>c m<?>i hon d<?> bi<?>t cac di<?>u kho<?>n b<?>n quy<?>n.  Chung
       toi cho r<?>ng KHONG CO TRACH NHI<?>M PHAP LY.

       N<?>u b<?>n tim th<?>y m<?>t s<?> sai sot trong b<?>n d<?>ch c<?>a
       trang hu<?>ng d<?>n nay, vui long g<?>i thu d<?>n TODO <>.

GNU coreutils 9.4             Thang 1 nam 2024                         JOIN(1)