即使删除该行也获得插入的最后一行ID

Question

I'm trying to get the last row id from a table in MySQL, using PHP and I have the following code:

$query = "SELECT MAX(id) FROM #__djcf_items";   
$db->setQuery($query);
$id = $db->loadResult()+1;

And it works, but if I delete last row then that code will return what I want -1...

How can I get the "global" last row id even after deleting row(s)?

Answer 1

You can find solution on this topic.

SELECT TABLE_ROWS
FROM information_schema.tables 
WHERE table_name='the_table_you_want' -- Can end here if only 1 DB 
  AND table_schema = DATABASE();      -- See comment below if > 1 DB

Answer 2

您可以在数据库上运行另一个select，并向其查询数据库最后一行的最后一个id：

SELECT * FROM your_table ORDER BY id DESC LIMIT 1