SQLite3
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SQLite3::querySingle

(PHP 5 >= 5.3.0)

SQLite3::querySingleExecutes a query and returns a single result

说明

public mixed SQLite3::querySingle ( string $query [, bool $entire_row = false ] )

Executes a query and returns a single result.

参数

query

The SQL query to execute.

entire_row

By default, querySingle() returns the value of the first column returned by the query. If entire_row is TRUE, then it returns an array of the entire first row.

返回值

Returns the value of the first column of results or an array of the entire first row (if entire_row is TRUE).

If the query is valid but no results are returned, then NULL will be returned if entire_row is FALSE, otherwise an empty array is returned.

Invalid or failing queries will return FALSE.

范例

Example #1 SQLite3::querySingle() example

<?php
$db 
= new SQLite3('mysqlitedb.db');

var_dump($db->querySingle('SELECT username FROM user WHERE userid=1'));
print_r($db->querySingle('SELECT username, email FROM user WHERE userid=1'true));
?>

以上例程的输出类似于:

string(5) "Scott"
Array
(
    [username] => Scott
    [email] => scott@example.com
)


SQLite3
在线手册:中文 英文
PHP手册
PHP手册 - N: Executes a query and returns a single result

用户评论:

truepassword at mail dot ru (05-Mar-2012 02:38)

RU
Какой смысл в этой функции? Ведь можно же и обычным query выбрать 1 строку или 1 ячейку. Почему тогда аналогичной функции нет для MySQL? Или тут какие-то особенности в реализации SQLite?

EN (google translate)
What is the use of this function? Fact can also use function ?query? for select one row or one field. Why then no similar function for MySQL? Or are there any features in realization SQLite?