I have a MySQL table with around 2m rows in it. I'm trying to run the below query and each time it's taken over 5 seconds to get results. I have an index on created_at column. Below is the EXPLAIN…
Below is the query added by me, But it took say 0.35 second, Thoulgh it is not a large value, I am worried that the same query can cause memmory and processor load when the traffic is high on the…
Situation: Imagine some script that, upon completion, inserts the current timestamp and some other data into a MySQL table. It's executed every thirty minutes, sometimes not at all, leaving gaps in the data. Goal: Have a query that fetches all…
I have two tables like this : Enterprises FullName Type ABC aze 1 DEF rty 2 Addresses Address1 Address2 Address3 Postcode City 165 Ward Street E1 7AW London 167 Ward Street E1 7AW London 10 Auckland Street N1 0AA London…
Trying to get an average of number from a table based on the latest dates of each. It works, but really slow, 30 seconds. Main table has 5,782 rows, and is growing. Anyway to change this query and make it…
I checked other questions with the same issue, But they seem not to have a primary key or the number of rows to examine is low which lets MySQL decides not to use an index. In my case it is…
Here's my query: SELECT COUNT(1) FROM nhd WHERE gnis_id IN (01372336); The table definition has an INDEX gnis_id (gnis_id) on it and, indeed, that index is used with this query. BUT when I replace the COUNT(1) with * the index…
I have a compound index on 3 columns. Now I want to execute the query based on only 2 columns, which both are not indexed. So the query takes long time to execute. How to I make use of the…
I have a search function which works with a small amount of data, but after I filled the database with ten thousands of data, the site gets stuck on loading when I try to search for something. pubblic function searchVideo(Request…
SELECT * FROM `users` WHERE `id` != 1 AND `users`.`activated` = 1 AND NOT EXISTS ( SELECT 1 FROM `blockings` WHERE (blockings.user_id = users.id AND blockings.blocked_id = 1) OR(blockings.blocked_id = users.id AND blockings.user_id = 1)) ORDER BY users.id DESC LIMIT…