mysql 导出数据库举例

mysqldump -u username -p database_name > backup_file.sql

mysqldump -u root -p mydatabase > mydatabase_backup.sql

<?php
$host = 'localhost';
$username = 'root';
$password = 'your_password';
$dbname = 'mydatabase';

// 创建连接
$conn = new mysqli($host, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 导出数据库
$sql = "SELECT * INTO OUTFILE '/tmp/mydatabase_backup.csv' 
        FIELDS TERMINATED BY ',' 
        ENCLOSED BY '\"' 
        LINES TERMINATED BY '
' 
        FROM your_table";

if ($conn->query($sql) === TRUE) {
    echo "数据库导出成功";
} else {
    echo "导出失败: " . $conn->error;
}

$conn->close();
?>

chmod 755 /path/to/export/directory

mysqldump --default-character-set=utf8 -u username -p database_name > backup_file.sql

mysqldump --single-transaction -u username -p database_name | gzip > backup_file.sql.gz