I have many complex SQL queries that I would like to optimize. The perfor开发者_开发问答mance on it is pretty bad. Is there an online tool to optimize such queries?If you are talking about MS SQL Serv
This question is linked to my previous one ( posted as an anonymous user - now I have an account ) and, before I begin, I would like to give the credit to Rob Farley for providing the right indexing s
Suppose I have a SQL table of Awards, with fields for Date and Amount. I need to generate a table with a sequence of consecutive dates, the amount awarded in each day, and the running (cumulative) tot
I have few questions on SQL.. How to analyze the performance of a query? Any soft开发者_如何转开发ware, inbuilt
I have HDF5 files with multiple groups, where each group contains a data set with >= 25 million rows.At each time step of simulation, each agent outputs the other agents he/she sensed at that time ste
While implementing a tree structure over a SQL 2005 server database, the query response is taking too long ( below queries are talking more than 5 sec ) when using LIKE clause combined with the EXISTS
What is the meaning of Select tables optimized away in MySQL Explain plan? explain select count(comment_count) from wp_posts;
Hoping someone can help with this.I have a query that pulls data from a PHP application and turns it into a view for use in a Ruby on Rails application.The PHP app\'s table is an E-A-V style table, wi
I have a table that has a foreign key to a table that stores some blob data. When I do an inner join on the tables with a condition on the main table the join type goes from \'index\' to \'ALL\'. I wo
Background: I am parsing a 330 meg xml file into a DB (netflix catalog) using PHP script from the console.
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