maxdb_query
(PECL)
maxdb_query
(no version information, might be only in CVS)
maxdb->query -- Performs a query on the database
Description
Procedural style:
mixed
maxdb_query ( resource link, string query [, int resultmode] )
Object oriented style (method):
class
maxdb {
mixed
query ( string query )
}
The maxdb_query() function is used to simplify the
act of performing a query against the database represented by the
link parameter.
Return values
如果成功则返回 TRUE,失败则返回 FALSE。 For SELECT, SHOW, DESCRIBE or
EXPLAIN maxdb_query() will return
a result resource.
Example
例子 1. Object oriented style
<?php $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); }
/* Create table doesn't return a resultset */ if ($maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) { printf("Table mycity successfully created.\n"); }
/* Select queries return a resultset */ if ($result = $maxdb->query("SELECT name FROM hotel.city")) { printf("Select returned %d rows.\n", $result->num_rows);
/* free result set */ $result->close(); }
/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */ if ($result = $maxdb->query("SELECT * FROM hotel.city", MAXDB_USE_RESULT)) { $result->close(); }
$maxdb->close(); ?>
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例子 2. Procedural style
<?php $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); }
/* Create table doesn't return a resultset */ if (maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) { printf("Table mycity successfully created.\n"); }
/* Select queries return a resultset */ if ($result = maxdb_query($link, "SELECT name FROM hotel.city")) { printf("Select returned %d rows.\n", maxdb_num_rows($result));
/* free result set */ maxdb_free_result($result); }
/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */ if ($result = maxdb_query($link, "SELECT * FROM hotel.city", MAXDB_USE_RESULT)) { maxdb_free_result($result); }
maxdb_close($link); ?>
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The above examples would produce the following output:
Table mycity successfully created.
Select returned 25 rows. |