11-14-2006
performing queries on file data
Can anyone help..
I have a .dat file which contains 5 columns of data. I need to select one row containing just 3 of the columns. I'm not sure how to select a single row? I then need perform arithmetic on on two out of the three columns and display the output in a new column.
For example..
..I would need to select the Title Price and Quantity for Book 1 and multiply Quantity by Price and display the answer in a new column.
I need to do this from the command line without opening the file.
Any ideas?
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LEARN ABOUT PHP
fbsql_fetch_array
FBSQL_FETCH_ARRAY(3) 1 FBSQL_FETCH_ARRAY(3)
fbsql_fetch_array - Fetch a result row as an associative array, a numeric array, or both
SYNOPSIS
array fbsql_fetch_array (resource $result, [int $result_type])
DESCRIPTION
fbsql_fetch_array(3) is a combination of fbsql_fetch_row(3) and fbsql_fetch_assoc(3).
An important thing to note is that using fbsql_fetch_array(3) is NOT significantly slower than using fbsql_fetch_row(3), while it provides
a significant added value.
PARAMETERS
o $
result -A result identifier returned by fbsql_query(3) or fbsql_db_query(3).
o $result_type
- A constant and can take the following values: FBSQL_ASSOC, FBSQL_NUM, or FBSQL_BOTH. When using FBSQL_BOTH, in addition to
storing the data in the numeric indices of the result array, it also stores the data in associative indices, using the field names
as keys.
RETURN VALUES
Returns an array that corresponds to the fetched row, or FALSE if there are no more rows.
If two or more columns of the result have the same field names, the last column will take precedence. To access the other column(s) of the
same name, you must the numeric index of the column or make an alias for the column.
select t1.f1 as foo t2.f1 as bar from t1, t2
EXAMPLES
Example #1
fbsql_fetch_array(3) example
<?php
fbsql_connect($host, $user, $password);
$result = fbsql_db_query("database", "select user_id, fullname from table");
while ($row = fbsql_fetch_array($result)) {
echo "user_id: " . $row["user_id"] . "<br />
";
echo "user_id: " . $row[0] . "<br />
";
echo "fullname: " . $row["fullname"] . "<br />
";
echo "fullname: " . $row[1] . "<br />
";
}
fbsql_free_result($result);
?>
SEE ALSO
fbsql_fetch_row(3), fbsql_fetch_assoc(3), fbsql_fetch_object(3).
PHP Documentation Group FBSQL_FETCH_ARRAY(3)