Now we can access the values from mysql result set based on the index and/or with the name.
For eg: SELECT name,id FROM tbl_user
name = resultset[0] OR name = resultset['name']
I need to retrieve the values from mysql result set with only index or with name.
i am using PHP.
You can get result row as an associative array, a numeric array, or both.
mysql_fetch_array can be used. Use make of the second optional parameter to get the result in desired array type.
array mysql_fetch_array ( resource $result [, int $result_type = MYSQL_BOTH ] )
result type can be MYSQL_ASSOC, MYSQL_NUM or MYSQL_BOTH (default)
you can also use the mysql_fetch_assoc, if you need result only an associative array.
use
mysql_fetch_array($resultset);
or to get associative array use
mysql_fetch_assoc($resultset);
Check this link for details mysql fetch array
Related
I have a script that is outputting to a CSV file. However, even though there is currently one row in the database, the output I'm getting is echoing out each column from each row in the table twice.
For example:
1,1,John,John,Smith,Smith,2014,2014
Should be
1,John,Smith,2014
This worked fine before I went with PDO and prepared statements, so I'm thinking maybe I'm not understanding how fetch() works correctly.
Below is my code. Any idea what I could be doing wrong?
// get rows
$query_get_rows = "SELECT * FROM Contacts ORDER BY date_added DESC";
$result_get_rows = $conn->prepare($query_get_rows);
$result_get_rows->execute();
$num_get_rows = $result_get_rows->rowCount();
while ($rows_get_rows = $result_get_rows->fetch())
{
$csv .= '"'.join('","', str_replace('"', '""', $rows_get_rows))."\"\n";
}
echo $csv;
exit;
You should say to PDO, that you want only an associative array or a numbered array:
while ($rows_get_rows = $result_get_rows->fetch(PDO::FETCH_ASSOC))
to get an associative array or
while ($rows_get_rows = $result_get_rows->fetch(PDO::FETCH_NUM))
to get an array indexed by the column number
from PDOStatement::fetch
fetch_style
Controls how the next row will be returned to the caller.
This value must be one of the PDO::FETCH_* constants, defaulting to
value of PDO::ATTR_DEFAULT_FETCH_MODE (which defaults to
PDO::FETCH_BOTH).
PDO::FETCH_ASSOC: returns an array indexed by column name as returned
in your result set
PDO::FETCH_BOTH (default): returns an array indexed by both column
name and 0-indexed column number as returned in your result set
I'm using the following code to query my Firebird database, but the results do not include the column names, just numbers. It's my first time working with Firebird, I only worked with MySQL. Is there a way to get column names instead of numbers?
$dbh = ibase_connect($cdb, $this->session->userdata('client_username'), $this->session->userdata('client_password'), 'utf-8', '100');
$rid = ibase_query($dbh, $query);
$coln = ibase_num_fields($rid);
$dataArr = array();
while ($row = ibase_fetch_row ($rid)) {
$dataArr[] = $row;
}
Result:
Array
(
[0] => Array
(
[0] => 1
)
)
How can I get the column name that was [User_Id] instead of [0]? Is it possible?
As suggested by Dharman in the comments, you need to use ibase_fetch_assoc instead of ibase_fetch_row to get a result using column names (associative array).
As documented for ibase_fetch_assoc:
fetches one row of data from the result. 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 either
need to access the result with numeric indices by using
ibase_fetch_row() or use alias names in your query.
Compared to ibase_fetch_row:
Returns an array that corresponds to the fetched row, or false if
there are no more rows. Each result column is stored in an array
offset, starting at offset 0.
When you prepare a query Firebird returns the resultset information for it, including column datatypes and aliases. Use fbird_field_info(...) to query the alias.
https://www.php.net/manual/en/function.ibase-prepare.php
https://www.php.net/manual/en/function.ibase-field-info.php
I have a script that is outputting to a CSV file. However, even though there is currently one row in the database, the output I'm getting is echoing out each column from each row in the table twice.
For example:
1,1,John,John,Smith,Smith,2014,2014
Should be
1,John,Smith,2014
This worked fine before I went with PDO and prepared statements, so I'm thinking maybe I'm not understanding how fetch() works correctly.
Below is my code. Any idea what I could be doing wrong?
// get rows
$query_get_rows = "SELECT * FROM Contacts ORDER BY date_added DESC";
$result_get_rows = $conn->prepare($query_get_rows);
$result_get_rows->execute();
$num_get_rows = $result_get_rows->rowCount();
while ($rows_get_rows = $result_get_rows->fetch())
{
$csv .= '"'.join('","', str_replace('"', '""', $rows_get_rows))."\"\n";
}
echo $csv;
exit;
You should say to PDO, that you want only an associative array or a numbered array:
while ($rows_get_rows = $result_get_rows->fetch(PDO::FETCH_ASSOC))
to get an associative array or
while ($rows_get_rows = $result_get_rows->fetch(PDO::FETCH_NUM))
to get an array indexed by the column number
from PDOStatement::fetch
fetch_style
Controls how the next row will be returned to the caller.
This value must be one of the PDO::FETCH_* constants, defaulting to
value of PDO::ATTR_DEFAULT_FETCH_MODE (which defaults to
PDO::FETCH_BOTH).
PDO::FETCH_ASSOC: returns an array indexed by column name as returned
in your result set
PDO::FETCH_BOTH (default): returns an array indexed by both column
name and 0-indexed column number as returned in your result set
While working with PHP ,handling connection's with Database (MySQL)
$result = mysql_query('select * from products');
$row = mysql_fetch_array($result);
And yesterday founded out that array $row had Duplicate data within.
First you have Data's selected from database arranged in Indexes like : $row[0] = ID; than you also could find $row['ID'] = ID.
So is this only a feature of the Framework ,which copies data Virtually or are these Data's stored twice in array .
To get only one value set, you need to pass a second parameter to mysql_fetch_array.
either "MYSQL_ASSOC" to get an associative array, or "MYSQL_NUM" to get a normal array.
Example:
$row = mysql_fetch_array($result, 'MYSQL_ASSOC')
This will return:
$row['id']
Documentation
Straight from the manual:
mysql_fetch_array — Fetch a result row as an associative array, a
numeric array, or both
The prototype of the function says that
array mysql_fetch_array ( resource $result [, int $result_type = MYSQL_BOTH ] )
meaning that it returns both arrays by default - that is - duplicating the info
mysql_fetch_array fetches a result row as an associative array, a numeric array, or both. Please see: mysql_fetch_array.
Each row in $result has an index, a name and a value. You can look up a row's value by either index or name.
See the documentation for mysql_fetch_array()
Default setting is to fetch an array with both numeric and associative array. See PHP manual to change that.
I want to fetch values from a table in a MySQL database into PHP.
What kind of array will mysql_fetch_array($result) return? Associative or numeric?
array mysql_fetch_array ( resource $result [, int $result_type =
MYSQL_BOTH ] )
It depends on the second parameter which is default MYSQL_BOTH and could be MYSQL_ASSOC, MYSQL_NUM, and MYSQL_BOTH.
More info about mysql_fetch_array.
From the manual:
mysql_fetch_array — Fetch a result row as an associative array, a numeric array, or both
It returns an array with both numeric and string indexes.