MDB_Common::queryCol() (Previous) (Next) MDB_Common::queryRow()
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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])

Beschreibung

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.

Parameter

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

Rückgabewert

mixed - the returned value or a MDB_Error, if fail

Fehler-Meldungen

Tabelle 39-1. Mögliche Fehler-Arten

Error codeError messageReasonSolution
MDB_ERROR_NO_DB_SELECTED NULL No database was chosen. 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 statement. Ie. using LIMIT in a SQL-Statement for an Oracle database.

Hinweise

Diese Methode kann nicht statisch aufgerufen werden.

Siehe auch

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

MDB_Common::queryCol() (Previous) (Next) MDB_Common::queryRow()
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