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Annotation of coherent/a/usr/man/COHERENT/join, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: join                         Command                         join
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        !             8: Join two data bases
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        !            10: jjooiinn [-aa [_n] ] [-ee _s_t_r_i_n_g ] [-jj[_n] _k_e_y_f] [-oo _n._m ...] [-tt_c] _f_i_l_e_1 _f_i_l_e_2
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        !            12: join processes the text files file1 and file2, each of which con-
        !            13: tains a  relational data base.   If either file name  is `-', the
        !            14: standard input is used for that file.
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        !            16: For the  purposes of  join, a  data base file  contains a  set of
        !            17: records, one  per input line.   Each record contains  a number of
        !            18: fields.  One field is  differentiated as key field for each file.
        !            19: Each file must be sorted by key field, for example with sort.
        !            20: 
        !            21: By default, the key field is the first field in each record.  The
        !            22: -j option  changes the key  field number to keyf  for the desired
        !            23: file.  In this and  other options below, the optional file number
        !            24: n must be 1 to indicate file1 or 2 to indicate file2.  If no n is
        !            25: given, both file1 and file2 are assumed.
        !            26: 
        !            27: Normally,  fields are  separated  by any  amount  of white  space
        !            28: (blanks or tabs).  Leading blanks or tabs are not considered part
        !            29: of the fields.  With the -t option, the separator character is c.
        !            30: With this  option zero-length  fields are possible;  every occur-
        !            31: rence of  the separator ends the previous field  and starts a new
        !            32: one.
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        !            34: Output consists only of records for which the key field occurs in
        !            35: both files.   As a consequence of the sorted  order of the input,
        !            36: the output  is also sorted by the key  field.  Each output record
        !            37: has first  the key field,  then each field from  the file1 record
        !            38: but the key field, and then  each field from the file2 record but
        !            39: the  key field.   Fields  are separated  in the  output with  the
        !            40: specified field  character, or  with a  space character if  no -t
        !            41: option was  given.  Output records  are always terminated  with a
        !            42: newline.  Under  the -e option, string is  printed for each empty
        !            43: field.
        !            44: 
        !            45: The -a  option enables printing of records found  in only file n.
        !            46: If n  is missing,  unpaired records  are printed from  both input
        !            47: files.  To  output only certain fields, the  -o option precedes a
        !            48: list of desired fields to print.  Each element is of the form n.m
        !            49: where n is the file number and m is the field number.
        !            50: 
        !            51: For example,
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        !            53: 
        !            54:         join -t: -j1 3 -o 1.3 2.4 1.4 1.1 2.2 filea fileb
        !            55: 
        !            56: 
        !            57: joins filea  and fileb which  have fields separated  by the colon
        !            58: (`:') character.  The join field number  is 3 for filea and 1 (by
        !            59: default) for fileb.  The selected five fields are produced in the
        !            60: output.
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        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
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        !            69: join                         Command                         join
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        !            72: 
        !            73: ***** See Also *****
        !            74: 
        !            75: awk, comm, commands, sort, uniq
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        !           130: COHERENT Lexicon                                           Page 2
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