All we need is an easy explanation of the problem, so here it is.
I have a database with 200000 rows. Of those 200000 rows I want the latest 25000 and from those I need the oldest id (column entity_id).
This is my query so far:
select * from sales_flat_order order by entity_id desc limit 25000;
This is aleady running forever. Is there a better way? Maybe its easier to get the entity_id on position 25000, but it has to be ordered, I need to have id on position 25000 of the latest entries.
This is the create statement of the table: https://pastebin.com/mrY7CTP8
How to solve :
I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.
You can use LIMIT offset
select * from sales_flat_order order by entity_id desc limit 24999,1;
The OFFSET value allows us to specify which row to start from retrieving data.
offset — > 24999 hence the starting position is 25000.
row_count — > 1 only one value returned
Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂