Re: Slowest Queries

[Peter Brawley]

WB probably silently adds a scoping Limit clause whereas your PHP script may have tried to retrieve all rows from the query.

To find how to speed up the query, please post MySQL version, amount of RAM, innodb_buffer_pool_size, and the results of ...

show create table `table`;

explain analyze
select count(distinct(Col_A)),ID,NAME
from table
where data between `2022-06-24 00:00:00` and ` 2022-06-24 23:59:59`
group by ID, NAME;

BTW, why not just ...where left(data,10)='2022-06-24'... ?