I was wondering if anybody would have some input on how I could possibly optimize this MySQL query. I think I\'m doing the right thing with indexes so don\'t think I can get this query any faster (it\
Let\'s say I have the following association: Club has_many users User has_many guns Gun has_many bullets
I have a task to optimize this query, any idea will be appreciated. SELECT DISTINCT `br`.`id` AS `branch_id`
From a client I receive SQL queries that contain all sorts of redundant sub-SELECTs, generated by a builder in MS Access. I convert the SQL to Postgres, and it runs - but I know it\'s hopelessly ineff
Hey, I am trying to create a system to match wildcard开发者_JS百科 domain names. Although the query above will work for me is it possible to index it at all?
Are MySQL operations multithreaded? Specifically, o开发者_如何学JAVAn running a select, does the select (or join) algorithm spawn multiple threads to run together? Would being multi-threaded prevent
I have a table which keeps parent-child-relations between items. Those can be changed over time, and it is necessary to keep a complete history so that I can query how the relations were at any time.
I am currently using the following query to get some numbers: SELECT gid, count(gid), (SELECT cou FROM size WHERE gid = infor.gid)
So I started off with this query: SELECT * FROM TABLE1 WHERE hash IN (SELECT id FROM temptable); It took forever, so I ran an explain:
I have large MySQL tables with hundreds of thousands of rows. I need to write a query on a customers table which gets the count of when customers will be available to contact again.
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