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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])

Description

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

Return value

mixed - the returned value or a MDB_Error, if fail

Throws

Table 33-1. Possible PEAR_Error values

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.

Note

This function can not be called statically.

See

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

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