I have a database that looks like: contacts id | name 1| bob 2| jack 3| jill contactsGroupLink cId| gId 1| 1 2| 3
I am writin开发者_如何学Gog an exporter within my current Rails3 project right now. This exporter has to mark every exported record as \"exported\" (bool). I know how to do this easily in a loop, but
I have this Informix SQL statement which takes ages to run.Does anybody see any way to optimize it so it wouldn\'t take so long?
If a query is constantly sent to a database at short intervals, say every 5 seconds, could the number of reads generated cause problems in terms of performance or availability? If the database is Orac
I\'m learning MS SQL Server 2008 R2 so please excuse my ignorance. This query takes 3 sec and I would like to do it in less than 1 sec.
I have a charting application that dynamically generates SQL Server queries to compute values for each series on a given chart.This generally works quite well, but I have run into a particular situati
I have a table with 900k+ records it takes a minute or more to run this query: SELECT t.user_id, SUM(t.direction = \"i\") AS \'num_in\',
if this is my USERS table user_id user_fname user_lname user_email user_pass user_verified user_city user_joined
Well friends, I have got this query which works but is very long for the execution. I was wonderin开发者_高级运维g whether there is a faster way to achieve this.
While troubleshooting a server with very high I/O wait, I notice there is a lot of I/O coming from queries which do SELECT max(x) FROM t WHERE y = ?.
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