Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with query-performance
Search options not deleted
user 186435
For questions about improving the performance and/or efficiency of database queries.
0
votes
Storing the groupwise most recent related record
After looking some more, I discovered sql triggers and figured out how to update latest_purchase_id with one. That takes away a lot of the hassle and performance loss during insertions, but I'm still …
0
votes
2
answers
96
views
Storing the groupwise most recent related record
I have two tables, customers and purchases. There are a lot (thousands) of purchases per customer. I usually only need the most recent purchase for each customer, which is why I have the "latest_purch …
2
votes
1
answer
154
views
Why is my indexed DISTINCT ON so much slower than my INNER JOIN?
I have two tables, customers and purchases. There are a lot (thousands) of purchases per customer. I usually only need the most recent purchase for each customer, which is why I have the latest_purcha …