My question quite a general one. I have to create a prototype of a query optimizer for mySQL, that works instead of standard one, or complements it. It doesn\'t have to be very complicated, at the be
In SQLite, given this database schema CREATE TABLE observations ( src TEXT, dest TEXT, verb TEXT, occurrences INTEGER
Im recording slow queries longer than 2 seconds. That is running fine except, the daily backups also get recorded in slow log because 1) mysqldump calls select * from xyz (big table); and 2) when inse
I\'m looking for a way to fetch all data fro开发者_JAVA百科m a huge table in smaller chunks. Please advise.To answer a question from the title
I am reading Grant Fritchey\'s excellent book, SQL Server Execution Plans. On pg. 21 he states, \"When a query is submitted to the server, an estimated execution plan is created by the optimizer. Once
The following query is using temporary and filesort. I\'d like to avoid that if possible. SELECT lib_name, description, count(seq_id), floor(avg(size))
please I have the same problem as I found here MySQL - Selecting data from multiple tables all with same structure but different data ,
hoping you can help me on the right track to start optimising my queries. I\'ve never thought too much about optimisation before, but I have a few queries similar to the one below and want to start co
I could use some help determining the best (most performant / easily maintainable) strategy for retrieving parent-child objects from a SQL db.
From the Order By Optimization in Mysql documentation, I quote... In some cases, MySQL cannot use indexes to resolve the ORDER BY,
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