1CSVJOIN(1)                          csvkit                          CSVJOIN(1)
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NAME

6       csvjoin - csvjoin Documentation
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DESCRIPTION

9       Merges  two or more CSV tables together using a method analogous to SQL
10       JOIN operation. By default it performs an inner join, but  full  outer,
11       left  outer,  and right outer are also available via flags. Key columns
12       are specified with the -c flag (either a single column which exists  in
13       all tables, or a comma-separated list of columns with one corresponding
14       to each). If the columns flag is not provided then the tables  will  be
15       merged “sequentially”, that is they will be merged in row order with no
16       filtering:
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18          usage: csvjoin [-h] [-d DELIMITER] [-t] [-q QUOTECHAR] [-u {0,1,2,3}] [-b]
19                         [-p ESCAPECHAR] [-z FIELD_SIZE_LIMIT] [-e ENCODING] [-L LOCALE]
20                         [-S] [--blanks] [--date-format DATE_FORMAT]
21                         [--datetime-format DATETIME_FORMAT] [-H] [-K SKIP_LINES] [-v]
22                         [-l] [--zero] [-V] [-c COLUMNS] [--outer] [--left] [--right]
23                         [-y SNIFF_LIMIT] [-I]
24                         [FILE [FILE ...]]
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26          Execute a SQL-like join to merge CSV files on a specified column or columns.
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28          positional arguments:
29            FILE                  The CSV files to operate on. If only one is specified,
30                                  it will be copied to STDOUT.
31
32          optional arguments:
33            -h, --help            show this help message and exit
34            -c COLUMNS, --columns COLUMNS
35                                  The column name(s) on which to join. Should be either
36                                  one name (or index) or a comma-separated list with one
37                                  name (or index) for each file, in the same order that
38                                  the files were specified. May also be left
39                                  unspecified, in which case the two files will be
40                                  joined sequentially without performing any matching.
41            --outer               Perform a full outer join, rather than the default
42                                  inner join.
43            --left                Perform a left outer join, rather than the default
44                                  inner join. If more than two files are provided this
45                                  will be executed as a sequence of left outer joins,
46                                  starting at the left.
47            --right               Perform a right outer join, rather than the default
48                                  inner join. If more than two files are provided this
49                                  will be executed as a sequence of right outer joins,
50                                  starting at the right.
51            -y SNIFF_LIMIT, --snifflimit SNIFF_LIMIT
52                                  Limit CSV dialect sniffing to the specified number of
53                                  bytes. Specify "0" to disable sniffing entirely.
54            -I, --no-inference    Disable type inference when parsing CSV input.
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56          Note that the join operation requires reading all files into memory. Don't try
57          this on very large files.
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59       See also: ../common_arguments.
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EXAMPLES

62          csvjoin -c 1 examples/join_a.csv examples/join_b.csv
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64       This command says you have two  files  to  outer  join,  file1.csv  and
65       file2.csv.  The key column in file1.csv is ColumnKey, the key column in
66       file2.csv is Column Key.
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68       Add two empty columns to the right of a CSV:
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70          echo "," | csvjoin examples/dummy.csv -
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AUTHOR

73       Christopher Groskopf
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76       2022, Christopher Groskopf
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811.0.4                            Jan 21, 2022                       CSVJOIN(1)
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