PDO::query
(no version information, might be only in CVS)
PDO::query --
Executes an SQL statement, returning a result set as a PDOStatement object
说明
PDOStatement
PDO::query ( string statement )
PDO::query() executes an SQL statement in
a single function call, returning the result set (if any) returned by the
statement as a PDOStatement object.
For a query that you need to issue multiple times, you will realize better
performance if you prepare a PDOStatement object using
PDO::prepare() and issue the statement with multiple
calls to PDOStatement::execute().
参数
- statement
The SQL statement to prepare and execute.
返回值
PDO::query() returns a PDOStatement object.
范例
例子 1. Demonstrate PDO::query
A nice feature of PDO::query() is that it
enables you to iterate over the rowset returned by a
successfully executed SELECT statement.
<?php
function getFruit($conn) {
$sql = 'SELECT name, colour, calories FROM fruit ORDER BY name';
foreach ($conn->query($sql) as $row) {
print $row['NAME'] . "\t";
print $row['COLOUR'] . "\t";
print $row['CALORIES'] . "\n";
}
}
?>
|
上例将输出： apple red 150
banana yellow 250
kiwi brown 75
lemon yellow 25
orange orange 300
pear green 150
watermelon pink 90 |
|
参见
| PDO::exec() |
| PDO::prepare() |
| PDOStatement::execute() |