MySQL是一種關(guān)系型數(shù)據(jù)庫(kù)管理系統(tǒng)，廣泛應(yīng)用于現(xiàn)代web應(yīng)用程序的開(kāi)發(fā)和維護(hù)。在本文中，我們將介紹一些MySQL數(shù)據(jù)庫(kù)的存取方法。

1. 連接到MySQL

$host = "localhost";
$username = "username";
$password = "password";
$dbname = "databasename";
$conn = mysqli_connect($host, $username, $password, $dbname);
if(!$conn) {
die("Connection failed: " . mysqli_connect_error());
}

2. 創(chuàng)建表

$sql = "CREATE TABLE users (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)";
if(mysqli_query($conn, $sql)) {
echo "Table created successfully";
} else {
echo "Error creating table: " . mysqli_error($conn);
}

3. 插入數(shù)據(jù)

$sql = "INSERT INTO users (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";
if(mysqli_query($conn, $sql)) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "
" . mysqli_error($conn);
}

4. 查詢數(shù)據(jù)

$sql = "SELECT id, firstname, lastname FROM users";
$result = mysqli_query($conn, $sql);
if(mysqli_num_rows($result) >0) {
while($row = mysqli_fetch_assoc($result)) {
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "
";
}
} else {
echo "0 results";
}

5. 更新數(shù)據(jù)

$sql = "UPDATE users SET lastname='Doe' WHERE id=1";
if(mysqli_query($conn, $sql)) {
echo "Record updated successfully";
} else {
echo "Error updating record: " . mysqli_error($conn);
}

6. 刪除數(shù)據(jù)

$sql = "DELETE FROM users WHERE id=1";
if(mysqli_query($conn, $sql)) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . mysqli_error($conn);
}

以上就是一個(gè)基本的MySQL存取方法的介紹。當(dāng)然，MySQL還有更多強(qiáng)大的功能和數(shù)據(jù)類型，讀者可以深入學(xué)習(xí)和研究。