PHP: PDOStatement->fetchColumn() - Manual

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PDOStatement->fetchObject() PDOStatement->fetchAll()

Last updated: Sat, 27 Jan 2007

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# PDOStatement->fetchColumn()

(no version information, might be only in CVS)

PDOStatement->fetchColumn() -- Returns a single column from the next row of a result set

## Описание

class PDOStatement {
string fetchColumn ( [int column_number] )
}

Returns a single column from the next row of a result set or `FALSE` if there are no more rows.

## Список параметров

`column_number`

  0-indexed number of the column you wish to retrieve from the row. If no value is supplied, PDOStatement->fetchColumn() fetches the first column.

## Возвращаемые значения

PDOStatement->fetchColumn() returns a single column in the next row of a result set.

Внимание
There is no way to return another column from the same row if you use PDOStatement->fetchColumn() to retrieve data.

## Примеры

Пример 1. Return first column of the next row

`<?php
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();
/* Fetch the first column from the next row in the result set */
print("Fetch the first column from the next row in the result set:\n");
$result = $sth->fetchColumn();
print("name = $result\n");
print("Fetch the second column from the next row in the result set:\n");
$result = $sth->fetchColumn(1);
print("colour = $result\n");
?>`

Результат выполнения данного примера:

    Fetch the first column from the next row in the result set:
    name = lemon
    Fetch the second column from the next row in the result set:
    colour = red

## Смотрите также

PDO->query()
PDOStatement->fetch()
PDOStatement->fetchAll()
PDO->prepare()
PDOStatement->setFetchMode()

add a note User Contributed Notes
PDOStatement->fetchColumn()
seanferd at assmasterdonkeyranch dot com
25-Jan-2007 03:04
`This is an excellent method for returning a column count. For example:
<?php
$db = new PDO('mysql:host=localhost;dbname=pictures','user','password');
$pics = $db->query('SELECT COUNT(id) FROM pics');
$this->totalpics = $pics->fetchColumn();
$db = null;
?>
In my case $pics->fetchColumn() returns 641 because that is how many pictures I have in my db.`
add a note
PDOStatement->fetchObject() PDOStatement->fetchAll()

Last updated: Sat, 27 Jan 2007
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