Question

大家好，我正在尝试通过mySQL和php运行多个查询，但到目前为止还无法弄清楚……我读到mysqli_multi_query可能就是我想要的，并且仅在第一个查询被执行的情况下也尝试了运行，因为我使用了这种格式。 “ query”;“ query”;“ query”等...所以我的最后一次尝试是这样的“ query; query; query”等，但是没有人可以请他弄清楚让所有4个查询连续运行的语法。首先是查询，然后是php代码。

INSERT INTO queue (SELECT NULL,item1, log, Active FROM shipping WHERE Active = 1);
DELETE FROM shipping ORDER BY id ASC LIMIT 1;
UPDATE shipping SET Active ='0' ORDER BY id DESC LIMIT 1;
UPDATE shipping SET Active ='1' ORDER BY id ASC LIMIT 1;

这是php。

<?php

$servername = "localhost";
$database = "logistics";
$username = "root";
$password = "";

$conn = mysqli_connect($servername, $username, $password, $database);

 if (!$conn) {

die("Connection failed: " . mysqli_connect_error());
}

$sql = "INSERT INTO queue (SELECT NULL,item1, log, Active FROM shipping WHERE Active = 1);
   DELETE FROM shipping ORDER BY id ASC LIMIT 1;
    UPDATE shipping SET Active ='0' ORDER BY id DESC LIMIT 1;
    UPDATE shipping SET Active ='1' ORDER BY id ASC LIMIT 1"


 if (mysqli_multi_query($conn, $sql)) {
  echo "New record created successfully";
 } else {
  echo "Error: " . $sql . "<br>" . mysqli_error($conn);
  }

?>

先感谢

Answer 1

除了已经注释过的UPDATE语句中的错误语法外，您还应考虑将这些SQL代码拉入存储过程并从客户端代码中调用该过程，例如

create procedure usp_doSome
as
begin
INSERT INTO queue (SELECT NULL,item1, log, Active FROM shipping WHERE Active = 1);
DELETE FROM shipping ORDER BY id ASC LIMIT 1;
UPDATE shipping SET Active ='0' ORDER BY id DESC LIMIT 1;
UPDATE shipping SET Active ='1' ORDER BY id ASC LIMIT 1;
end

关于如何从php调用存储过程的知识，这里有许多示例。见下文

http://www.mysqltutorial.org/php-calling-mysql-stored-procedures/

How to call a MySQL stored procedure from within PHP code?

通过一个连接运行多个MySQL查询

1 个答案: