mysql获取一个表中的下一个自增(id)值的方法

MySQL: Get next AUTO_INCREMENT value from/for table

Note to self: To get the next auto_increment value from a table run this query: SELECT AUTO_INCREMENT FROM information_schema.TABLES WHERE TABLE_SCHEMA = $dbName AND TABLE_NAME = $tblName. Don’t forget it (again).

 

给自己做笔记:从表中获取下一个自增值时只要运行以下sql语句即可：

AUTO_INCREMENT FROM information_schema.TABLES WHERE TABLE_SCHEMA = $dbName AND TABLE_NAME = $tblName;

 

例如:

SELECT auto_increment FROM information_schema.`TABLES` WHERE TABLE_SCHEMA=’my_db_name’ AND TABLE_NAME=’my_table_name’;

 

原文地址:http://www.bram.us/2008/07/30/mysql-get-next-auto_increment-value-fromfor-table/

 

 

另附一种PHP+mysql的方法：

 

 

 

$tablename = “tablename”;

$next_increment = 0;

$qShowStatus = “SHOW TABLE STATUS LIKE ‘$tablename’”;

$qShowStatusResult = mysql_query($qShowStatus) or die ( “Query failed: ” . mysql_error() . “<br/>” . $qShowStatus );

 

$row = mysql_fetch_assoc($qShowStatusResult);

$next_increment = $row['Auto_increment'];

 

echo “next increment number: [$next_increment]“;

?>