All we need is an easy explanation of the problem, so here it is.
Now I am using this command to query user_id not in collections, this is my sql:
select *
from report_user_foundation
where !FIND_IN_SET(user_id ,(
select GROUP_CONCAT(login_user_ids) as bet_user_ids
from report_summary rs
where statistic_time >= 1606752000000)
)
I query user id from table report_user_foundation
that not in report_summary
table login_user_ids
column. but when the using the result user id to query in report_summary
that still exists.
select login_user_ids
from report_summary rs
where login_user_ids like '%4685%'
Am I sql is not correct? Am I missing something?
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.
Method 1
FIND_IN_SET ( GROUP_CONCAT )
— cleaver, but clunky. Instead of
select *
from report_user_foundation
where !FIND_IN_SET(user_id ,(
select GROUP_CONCAT(login_user_ids) as bet_user_ids
from report_summary rs
where statistic_time >= 1606752000000)
)
do
SELECT *
FROM report_user_foundation AS rsf
WHERE NOT EXISTS(
SELECT 1 FROM report_summary
ON rsf.user_id = login_user_ids
AND statistic_time >= 1606752000000
)
/* AND login_user_ids like '%4685%' */
or, alternatively,
SELECT rsf.*
FROM report_user_foundation AS rsf
LEFT JOIN report_summary rs
ON rsf.user_id = rs.login_user_ids
AND rs.statistic_time >= 1606752000000
WHERE rs.id IS NULL
/* AND login_user_ids like '%4685%' */
Alas, I don’t understand your comment about where login_user_ids like '%4685%'
. Perhaps it goes where I put the comments.
If these tables get big, this composite index may help:
report_summary: INDEX(login_user_ids, statistic_time)
Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0