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PHP Quiz PHP CertificatePHP mysql_query() Function
Complete PHP MySQL Reference
Definition and Usage
The mysql_query() function executes a query on a MySQL database.
This function returns the query handle for SELECT queries, TRUE/FALSE for other queries, or FALSE on failure.
Syntax
mysql_query(query,connection)
| Parameter | Description |
|---|---|
| query | Required. Specifies the SQL query to send (should not end with a semicolon) |
| connection | Optional. Specifies the MySQL connection. If not specified, the last connection opened by mysql_connect() or mysql_pconnect() is used. |
Tips and Notes
Note: This function fetches and buffers the recordset automatically. To run an unbuffered query, use mysql_unbuffered_query() instead.
Example 1
<?php
$con = mysql_connect("localhost","mysql_user","mysql_pwd");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$sql = "SELECT * FROM Person";
mysql_query($sql,$con);
// some code
mysql_close($con);
?>
$con = mysql_connect("localhost","mysql_user","mysql_pwd");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$sql = "SELECT * FROM Person";
mysql_query($sql,$con);
// some code
mysql_close($con);
?>
Example 2
Create a new database with the mysql_query() function:
<?php
$con = mysql_connect("localhost","mysql_user","mysql_pwd");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$sql = "CREATE DATABASE my_db";
if (mysql_query($sql,$con))
{
echo "Database my_db created";
}
else
{
echo "Error creating database: " . mysql_error();
}
?>
$con = mysql_connect("localhost","mysql_user","mysql_pwd");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$sql = "CREATE DATABASE my_db";
if (mysql_query($sql,$con))
{
echo "Database my_db created";
}
else
{
echo "Error creating database: " . mysql_error();
}
?>
Complete PHP MySQL Reference
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