duplicate-removal

问题 Yes, you can find similar questions numerous times, but: the most elegant solutions posted here, work for SQL Server, but not for Sybase (in my case Sybase Anywhere 11). I have even found some Sybase-related questions marked as duplicates for SQL Server questions, which doesn't help. One example for solutions I liked, but didn't work, is the WITH ... DELETE ... construct. I have found working solutions using cursors or while-loops, but I hope it is possible without loops. I hope for a nice,

问题 I have a system that will generate messages sporadically, and I would like to only submit either zero or one message every 5 minutes. If no message is generated, nothing would be processed by the queue consumer. If a hundred identical messages are generated within 5 minutes I only want one of those to be consumed from the queue. I am using AMQP(RabbitMQ), is there a way to accomplish this within rabbitmq or the AMQP protocol? Can I inspect a queue's contents to ensure that I don't insert a

问题 I've tried all sorts of PHP logic and PHP's built in functions to remove duplicate values but it is not working no errors shows up but all my JQuery and CSS doesn't work if use array_unique() in_array() to remove the duplicate objects in my array this is how i am creating my person_row_array inside a while loop: $person_row = Person::findByID($pi_claimant_row->person_id); $person_row_array[] = $person_row; object print_r is below: Array ( [0] => stdClass Object ( [id] => 12 [flat_no] =>

问题 I've tried all sorts of PHP logic and PHP's built in functions to remove duplicate values but it is not working no errors shows up but all my JQuery and CSS doesn't work if use array_unique() in_array() to remove the duplicate objects in my array this is how i am creating my person_row_array inside a while loop: $person_row = Person::findByID($pi_claimant_row->person_id); $person_row_array[] = $person_row; object print_r is below: Array ( [0] => stdClass Object ( [id] => 12 [flat_no] =>

问题 I have the following url: example.com/hellllllllllo And I was looking for a way to avoid repeated characters up to double. Inspired by this question/answers Remove Characters from URL with htaccess I have created the following htaccess document to avoid repeated characters. If the character is repeated more than 23 times the url is not completely rewrited and I was wondering if there is any possible improvment? RewriteCond %{REQUEST_METHOD} !=POST RewriteCond %{REQUEST_URI} ^(.*)l{3,}(.*)$

问题 Say I have a table with data like this: +------------------------------+------------+---------+ | email | uname | credits | +------------------------------+------------+---------+ | 824@hotmail.com | barbra | 6 | | 123@gmail.com | smith | 25 | | 123@gmail.com | smithy | 30 | | abc@hotmail.com | another | 25 | | def@comcast.net | rob | 8 | | abc@hotmail.com | ben | 62 | | ijk@yahoo.com | jeb | 2 | | ijk@yahoo.com | joe | 5 | +------------------------------+------------+---------+ So there is

问题 Say I have a table with data like this: +------------------------------+------------+---------+ | email | uname | credits | +------------------------------+------------+---------+ | 824@hotmail.com | barbra | 6 | | 123@gmail.com | smith | 25 | | 123@gmail.com | smithy | 30 | | abc@hotmail.com | another | 25 | | def@comcast.net | rob | 8 | | abc@hotmail.com | ben | 62 | | ijk@yahoo.com | jeb | 2 | | ijk@yahoo.com | joe | 5 | +------------------------------+------------+---------+ So there is

问题 I am working on exercise 16 from sql-ex.ru. The problem asks the following: Find the pairs of PC models having identical speeds and RAM. As a result, each resulting pair is shown only once, i.e. (i, j) but not (j, i). Result set: model with higher number, model with lower number, speed, and RAM. The database schema is : Product(maker, model, type) PC(code, model, speed, ram, hd, cd, price) Laptop(code, model, speed, ram, hd, screen, price) Printer(code, model, color, type, price) I wrote the

问题 I am trying to remove duplicate data from my database. I found a nice example on here of how to do this on an oracle database. The bottom query from that answer (only selecting the duplicate rows) works in MySQL, but the delete query (see below) does not... "DELETE FROM studios as a WHERE a.id > ANY (SELECT b.id FROM studios as b WHERE a.name = b.name AND a.email = b.email )" The error I get is: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server

问题 I am trying to identify near duplicate entries of names in a database. I am new to databases, however i am familiar with R. I can get clusters of near duplicates using fuzzy matching and soundex in R. However there are several names which are synonyms of each other. I would like to cluster the names based on this criteria along with the above ones. I want to do as suggested in Techniques for finding near duplicate records but with synonyms. I understand there is a sort of database of synonyms