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Results tagged with mysql
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user 8367
All versions of MySQL (not Microsoft SQL Server). Please also add a version-specific tag like mysql-5.7 if that is relevant to the question.
0
votes
1
answer
114
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How to optimize a delete query with a subselect? [closed]
This query needs to delete over 17 million rows, from a table containing 20 million.
DELETE FROM statements
where agreement_id IN (
select id FROM agreements
WHERE created < DATE_SUB(CURDAT …
- 115
0
votes
1
answer
40
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How can one fetch subtotal in relation to a group by from an outer query?
I have a simple query, where I would like to display for past 7 days, grouped by hour from a table apiRequest: The count of request having a transaction vs the count of those having no transaction.
…
- 115
0
votes
2
answers
1k
views
How can one calculate percentage from previous week in aggregate query?
It goes as follows:
mysql> SELECT
-> DATE_FORMAT(s.created, "%Y-%m-%d") as "Date",
-> count(s.id) AS "Accounts credited",
-> sum(s.withdrawal) "Total Credited"
-> -- 100 …
- 115
0
votes
1
answer
23
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Getting aggregate sub-values in aggregate query
I have a query that need to show aggregated values in an already aggregated outer query.
Consider a query that fetches total count of accounts being credited on a certain day.
I would like to displa …
- 115