SQL同时插入和更新

Question

Hey I have a query that will insert into the table a new data and I want that in the same time update an outher table with the id of the new data that I have entered. ex:

mysql_query("INSERT INTO `test` (`name`) VALUES ('Mark')");
$query = mysql_query("SELECT `id` FROM `test` WHERE `name` = 'Mark'");
$id = mysql_result($query,0);
mysql_quey("UPDATE `test2` SET `test_id` = $id WHERE `name` = 'Mark'");

How do I do it at same time? because doing it this way I only insert the new data and I dont update the other.

Cumps.

Answer 1

Try this :

mysql_query("INSERT INTO `test` (`name`) VALUES ('Mark')");
$id = mysql_insert_id();
mysql_quey("UPDATE `test2` SET `test_id` = $id WHERE `name` = 'Mark'");

I've changed the backticks to single quotes in your first insert for the values, backticks should never be used for field values.

Also I've changed it to use only two queries, the mysql_insert_id() will get the last inserted id without you needing to query it.

Ref : http://www.php.net/manual/en/function.mysql-insert-id.php

Answer 2

First of all, you do not need the select to get the id, there is mysql_insert_id() for that.

Then you have to use a transaction to make both queries feel like executed at the same time:

mysql_query('BEGIN');
mysql_query("INSERT INTO `test` (`name`) VALUES ('Mark')");
$id = mysql_insert_id();
mysql_query("UPDATE `test2` SET `test_id` = $id WHERE `name` = 'Mark'");
mysql_query('COMMIT');

A transaction makes sure both statements are executed, and no other script can come between them in any way.