MDB_Common::queryCol() (Previous) (Next) MDB_Common::queryRow()
View this page in Last updated: Mon, 02 Jul 2007
English | Dutch | French | German | Hungarian | Japanese | Polish | Russian | Spanish | Plain HTML

MDB_Common::queryOne()

MDB_Common::queryOne() -- fetch the first column of the first row

Synopsis

require_once 'MDB.php';

mixed &queryOne (string $query, string [$type = NULL])

Описание

Fetch the first column of the first row of data returned from a query. The function takes care of doing the query and freeing the results when finished.

Параметр

string $query

the SQL query or the statement to prepare

string $type

if supplied, the type of the cell in the result set will be set for fetching

Возвращаемое значение

mixed - the returned value or a MDB_Error, if fail

Throws

Таблица 35-1. Возможные значения PEAR_Error

Error codeError messageReasonSolution
MDB_ERROR_NO_DB_SELECTED NULL No database was choosen. Check the DSN in connect() .
every other error code  Database specific error Check the database related section of PHP-Manual to detect the reason for this error. In the most cases a misformed SQL statment. Ie. using LIMIT in a SQL-Statment for an Oracle database.

Заметка

Эта функция не должна вызываться статически.

См. также

query() , limitQuery() , prepareQuery() , executeQuery() , queryRow() , queryCol() , queryCol()

MDB_Common::queryCol() (Previous) (Next) MDB_Common::queryRow()
Download Documentation Last updated: Mon, 02 Jul 2007
Do you think that something on this page is wrong? Please file a bug report or add a note.
User Notes:
There are no user contributed notes for this page.