Here is my table: CREATE TABLE `letters` ( `a` bigint(20) unsigned NOT NULL, `b` bigint(20) unsigned NOT NULL,
I have a list that looks like this: myList = [1, 1, 1, 1, 2, 2, 2, 3, 3, 3] What I want to do is record the index where the items in the list changes value. So for my list above it would be 3, 6.
I\'ve got a Postgres 9.0 database which frequently I took data dumps of it. This database has a lot of indexes and everytime I restore a dump postgres starts background task vacuum cleaner (is that r
I\'d like to send a string to Solr and let it answer with all records which are a subset of that string.
Why are bitmap index operations have a tradeoff being high CPU bound开发者_如何学编程?
In my table I have some columns that have no index on them, searching for a value in those columns can take very long because SQLite does a full table scan.
This question already has answers here: 开发者_StackOverflow社区How to reindex an array? (6 answers)
I am planning to drop all of the indexes except the primary keys. I made the primary keys myself but all oth开发者_开发问答er indexes was suggestion of SQL Server.
There\'s a situation that arises in large database tables (~50 million rows) where users need to browse date-indexed records.
I have the following MySQL table (simplified): CREATE TABLE `track` ( `id` int(11) NOT NULL AUTO_INCREMENT,