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Top Forums UNIX for Dummies Questions & Answers find common lines using just one column to compare and result with all columns Post 302303297 by jim mcnamara on Thursday 2nd of April 2009 10:14:52 AM
Old 04-02-2009
What does 'just the column 1' mean? If column 1 is a small number your intersection will be large.

This is a start, using only column 1 to compare, giving a union:
Code:
awk ' FILENAME=="file1" { one[$1]=one[$1] $0}
        FILENAME=="file2" { two[$1]=two[$1] $0}
        END { for (i in one) { if (i in two) {print one[i], two[i]} }  }

If this is really what you want we can go on to creating "unique" output - an intersection.
 

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PG_FETCH_ALL_COLUMNS(3) 												   PG_FETCH_ALL_COLUMNS(3)

pg_fetch_all_columns - Fetches all rows in a particular result column as an array

SYNOPSIS
array pg_fetch_all_columns (resource $result, [int $column]) DESCRIPTION
pg_fetch_all_columns(3) returns an array that contains all rows (records) in a particular column of the result resource. Note This function sets NULL fields to the PHP NULL value. PARAMETERS
o $result - PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others). o $column - Column number, zero-based, to be retrieved from the result resource. Defaults to the first column if not specified. RETURN VALUES
An array with all values in the result column. FALSE is returned if $column is larger than the number of columns in the result, or on any other error. EXAMPLES
Example #1 pg_fetch_all_columns(3) example <?php $conn = pg_pconnect("dbname=publisher"); if (!$conn) { echo "An error occurred. "; exit; } $result = pg_query($conn, "SELECT title, name, address FROM authors"); if (!$result) { echo "An error occurred. "; exit; } // Get an array of all author names $arr = pg_fetch_all_columns($result, 1); var_dump($arr); ?> SEE ALSO
pg_fetch_all(3). PHP Documentation Group PG_FETCH_ALL_COLUMNS(3)
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