duplicates

I'm new in Cassandra and I've read that Cassandra encourages denormalization and duplication of data. This leaves me a little confused. Let us imagine the following scenario: I have a keyspace with four tables: A,B,C and D. CREATE TABLE A ( tableID int, column1 int, column2 varchar, column3 varchar, column4 varchar, column5 varchar, PRIMARY KEY (column1, tableID) ); Let us imagine that the other tables (B,C,D) have the same structure and the same data that table A, only with a different primary key, in order to respond to other queries. If I upgrade a row in table A how I can ensure

I have to write a method that takes an array of ints that is already sorted in numerical order then remove all the duplicate numbers and return an array of just the numbers that have no duplicates. That array must then be printed out so I can't have any null pointer exceptions. The method has to be in O(n) time, can't use vectors or hashes. This is what I have so far but it only has the first couple numbers in order without duplicates and then just puts the duplicates in the back of the array. I can't create a temporary array because it gives me null pointer exceptions. public static int[]

I have two text files, file1 and file2 . File1 contains a bunch of random words, and file2 contains words that I want to remove from file1 when they occur. Is there a way of doing this? I know I probably should include my own attempt at a script, to at least show effort, but to be honest it's laughable and wouldn't be of any help. If someone could at least give a tip about where to start, it would be greatly appreciated. get the words from each: f1 = open("/path/to/file1", "r") f2 = open("/path/to/file2", "r") file1_raw = f1.read() file2_raw = f1.read() file1_words = file1_raw.split() file2

I have a problem merging cells in excel based on similar values for one column- I would like to keep other columns data - let's view some screenshots and it will be clearer: This above is the initial state of the Data, what I want to achieve is this: I'm sure there is a way to do it with VB or formulas- I need the most simple way possible as this is for a customer and it needs to be easy. Thank you all in advanced. Option Explicit Private Sub MergeCells() Application.ScreenUpdating = False Application.DisplayAlerts = False Dim rngMerge As Range, cell As Range Set rngMerge = Range("A1:A100")

This question already has an answer here: Fuzzy matching deduplication in less than exponential time? 6 answers For example, I have a long list of strings, each string has about 30-50 characters, and I want to remove strings that are similar to some other string in that list (leaving only one occurrence from a family of duplicates). I looked at various string similarity algorithms , for example, Levenstein distance and the method presented in this article . They do work, but it's painfully slow - the best algorithm I came up with exhibits O(n^2) complexity and takes ~1.5s to process list with

I'm trying to make sql who will delete all duplicate titles BUT must delete duplicates with these conditions: must delete only duplicates with same object_id must keep only the newest record (biggest topic_id ) (topic_id is the unique id for every topic AI) So far I've done that (testing with select...) SELECT topic_id,object_id,title,url,date FROM topics GROUP BY title HAVING ( COUNT(title) > 1) ORDER BY topic_id DESC But doesn't meet the conditions. I'm using mysql. In MySQL , you cannot specify the target table to a DML operation in a subquery (unless you nest it more than one level deep,

I've seen the following (using the VALUES option): $query = "INSERT INTO $table (column-1, column-2, column-3) VALUES ('value-1', 'value-2', 'value-3') ON DUPLICATE KEY UPDATE SET column1 = value1, column2 = value2, column3 = value3, ID=LAST_INSERT_ID(ID)"; ... but I can't figure how to add ON DUPLICATE KEY UPDATE to what I'm using: $query = "INSERT INTO $table SET column-1 ='value-1', column-2 ='value-2', column-3 ='value-3' "; e.g.:, pseudo-code $query = "INSERT INTO $table SET column-1 ='value-1', column-2 ='value-2', column-3 ='value-3' ON DUPLICATE KEY UPDATE SET column1 = value1, column2