Podręcznik PHP
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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

## Opis

string PDOStatement::fetchColumn ( [int column_number] )

Returns a single column from the next row of a result set.

## Parametry

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.

## Zwracane wartości

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

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

## Przykłady

Przykład 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");
?>`

Powyższy przykład wyświetli:

    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

## Patrz także

PDO::query()
PDOStatement::fetch()
PDOStatement::fetchAll()
PDOStatement::prepare()
PDOStatement::setFetchMode()

Poprzedni | Spis treści | Następny
PDOStatement::fetchAll | Początek rozdziału | PDOStatement::fetchObject