MySQL语法如何实现数据导出（Swift）

在Swift语言中使用MySQL数据库实现数据导出，在Swift项目中引入相应的库文件。下面编程教程网小编给大家简单介绍一下具体实现代码！

具体实现代码如下：

let hostname = "localhost" // MySQL主机名
let username = "root" // MySQL用户名
let password = "password" // MySQL密码
let database = "mydatabase" // MySQL数据库名称

let mysql = MySQLDatabase(hostname: hostname, username: username, password: password, database: database)
let pool = EventLoopGroupConnectionPool(source: mysql, maxConnectionsPerEventLoop: 1, on: ... /* 选择EventLoop的方法 */)
defer { pool.shutdown() }

//数据导出
func exportData(toFile fileURL: URL) throws {
  let query = "SELECT * FROM users"
  let statement = MySQLStatement(query: query)
  let result = try statement.executeWithOutput(on: pool)
  
  var csvData = "First Name,Last Name
"
  for row in result {
    let firstName = row["firstName"]?.string ?? ""
    let lastName = row["lastName"]?.string ?? ""
    csvData.append(""(firstName)","(lastName)"
")
  }
  
  try csvData.write(to: fileURL, atomically: true, encoding: .utf8)
}