如何将多个查询更新为一个

Question

这是mu查询

$sql_query= "insert into shortdb1.currency_code set currency_code = 'KWD', 
based_on = 'KWD', currency_rate = '1.00', 
last_update = '2013-07-25 11:41:33';
insert into shortdb1.currency set currency_code = 'KWD', 
language_code = 'EN', currency_name = 'Kuwaiti Dinar';";


    $conn_1->query($sql_query)

但我得到错误

您的SQL语法有错误; 查看与MySQL服务器版本对应的手册，以便在' insert into shortdb1.currency set currency_code = 'KWD', language_code = 'EN','第4行附近使用正确的语法

Answer 1

您的查询需要存储为字符串，即：

$sql_query = insert into shortdb1.currency_code set currency_code = 'INR', based_on = 'KWD', currency_rate = '200', last_update = '2013-07-25 11:14:26';

需要是

$sql_query = "insert into shortdb1.currency_code set currency_code = 'INR', based_on = 'KWD', currency_rate = '200', last_update = '2013-07-25 11:14:26'";

Answer 2

查询和php句子结尾处缺少大量的引号和分号：

$sql_query = "insert into shortdb1.currency_code set currency_code = 'INR', based_on = 'KWD', currency_rate = '200', last_update = '2013-07-25 11:14:26';";

$sql_query .= "insert into shortdb1.currency set currency_code = 'INR', language_code = 'EN', currency_name = 'Indian Rupee', based_on = 'KWD', currency_rate = '200', last_update   = '2013-07-25 11:14:26';";

$conn_1->query($sql_query);

Answer 3

如果要发送多个更新查询，可以使用事务

$firstQuery = "insert into shortdb1.currency_code set currency_code = 'KWD', based_on = 'KWD', currency_rate = '1.00', last_update = '2013-07-25 11:41:33'";
$secondQuery = "insert into shortdb1.currency set currency_code = 'KWD', language_code = 'EN', currency_name = 'Kuwaiti Dinar';";

try {
    // create transaction
    $conn->beginTransaction();

    // multiple query commands
    $conn->query($firstQuery);
    $conn->query($secondQuery);
    // ect...

    // if we are here, then the above query got passed correctly without exception
    // now we can commit the transaction
    $conn->commit();
} 
catch (Exception $e) {
    // if above commands fails, the db gets a rollback task
    $conn->rollback();
}

这是在一个序列中对数据库使用多个插入/更新查询的好方法。

事务的强大之处在于，您可以创建一个更新查询数组，并在上面的块中循环遍历该数组，而不是多行查询。

Answer 4

我认为您的查询形成错误。 SET关键字用于UPDATE查询。

对于INSERT查询，它应采用以下形式：

INSERT INTO TABLE_NAME (column1, column2, column3)  
                VALUES (value1, value2, value3);