Now there is a question we commonly use this technique to maintain the parent child relation i.e we store all the entities in one tables with a parent_id column and all top most parents have 0 in the ...
I'd like to do the following in one query using MySQL: grab a row that has a parent_id of 0 grab a count of all the rows that have a parent_id of the row that we grabbed which has a parent_id of 0 ...
I'm new to MySQL. The GetFamilyTree(id) function that Rolando suggested in the Find highest level of a hierarchical field: with vs without CTEs question was great but when the id is greater than 999 ...
I'm not sure if the title is very good, feel free to suggest a better one. People can "comment" on different objects of my site,similarly to StackExchange (for example they can comment on a Question, ...
Show create table: CREATE TABLE `a` ( `id` int(11) NOT NULL, `name` varchar(255) DEFAULT NULL, `parent_id` int(11) DEFAULT NULL, PRIMARY KEY (`id`), KEY `parent_id` (`parent_id`), ...
note: this question has been updated to reflect that we are currently using MySQL, having done so, I would like to see a how much easier it would be if we switched to a CTE-supporting database. I ...