deduplication

Select * from (select distinct barcode, out_date, company_name, company_no, in_date, employee_name, addresser_name, send_address, addresser_phone From (select. barcode, B. company_name,. company_no,. in_date, D. employee_name,. addresser_name,. send_

1 2 3 4 5 New Document 6 7 8 9 10 13 14 15 16 17 18 48 1. First, we have two arrays. One in array A has a value. The other is array B. The other is array B. The idea is as follows: when we put the array in array a into array B one by one,

Suppose you have a list in Python that looks like this:[ 'A' , 'B' , 'A' ] # Or like this: [ 1 , 2 , 2 , 2 , 3 , 4 , 5 , 6 , 6 , 6 , 6 ] And you want to remove all duplicates so you get this result:[ 'A' , 'B' ] #

  1. Given two files a and B, each of them stores 5 billion URLs. Each URL occupies 64 bytes and the memory limit is 4 GB. Can you find the common URLs of files a and B?Solution 1: it can be estimated that the size of each file is 50 GB × 64 = 320

/***** Filter inclusion. The current keyword appears later, and the keyword is deleted later. * The keyword is left short and not long * @ param $ arr = array (); * @ return $ newArr = array (); * @ update 2013/9/24 */function arrFilter (& $ arr) {$

You have no time to test the following items, and you do not have time to implement them on your own. Record them first. // First add the indexof and lastindexof methods to the array object prototype. (if not,) if (! Array. prototype. indexof)

Design algorithms and write code to remove repeated characters in strings. No extra cache space is available. Note: one or two additional variables can be used, but an additional array copy is not allowed. Simple question: # Include # include

Mysqlselect * froma2kwlimit10; + ----------- + ------ + ---------- + | c1 | c2 | c3 | c4 | + ----------- + ------ + ---------- + | 662164461 | 131545534 | TOM0 | 20120520 | 226662142 | 605685564 | | TOM0 | 20120516 | 5270 Mysql select * from a2kw

It is relatively simple to implement array sorting in js by using the sort method in the array. The following is a good example. You can refer to how to implement array sorting in js, using the sort method in the array is relatively simple: I.

This article describes how to use a regular expression to match and intercept the specified substring and deduplicate in Python. It involves the skills related to Python Regular Expression matching and string truncation operations and has some

This is an SQL statement they developed to delete duplicate data and the row whose id is the minimum value is not deleted: deletefromjd_chapterawherea. 'id' in (select 'id' fromjd _ chaptergroup & nbs .. This is an SQL statement they developed to

This article mainly introduces php 3D array de-duplication sample code in detail. If you need it, you can refer to it. I hope it will help you to assume that it is an array $ my_array; The Code is as follows: // Create an empty array.$

This article mainly introduces php's method for removing duplicate items from two-dimensional arrays. For more information, see This article mainly introduces php's method for removing duplicate items from two-dimensional arrays. For more

Recently, in a project, repeated data needs to be removed, which was previously implemented in the background. Now the customer needs to de-duplicate data in the foreground, so he thought of javascript scripts. Project requirements: Code: The

Php multi-dimensional array de-duplication, how to remove the redundant name for? Array ( [0] => Array ( [Id] => 79 [Name] => ) [1] => Array ( [Id] => 79 [Name] => ) [2] => Array ( [Id] => 78 [Name] => B ) [3] => Array ( [Id] => 36 [Name] => c

Defines an array for storing the result after the row $result = Array (); Read UID list file $fp = fopen (' test.txt ', ' R '); while (!feof ($FP)){$uid = fgets ($FP);$uid = Trim ($uid);$uid = Trim ($uid, "R");$uid = Trim ($uid, "n"); if ($uid = = "

-- Environment: 64-bit 11.2G -- 1. CREATE a test TABLE and generate 20 million test data. 2 million of the test data is duplicated in create table test_t (id NUMBER (8) not null primary key, name VARCHAR2 (32); begin for I IN 1 .. 18000000 loop

Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->   A peer is puzzled by the above program code, mainly because he does not understand the following code: Code highlighting produced by Actipro

Arrays are often used in universities.AlgorithmExercise object. Some classic algorithms are very valuable, and they are useful for exams, installation, and interviews. But now is the Efficiency Era. programming focuses on production efficiency.

Here I want to discuss the next 5 algorithms to solve the de-duplication of web pages, reproduced from (http://blog.csdn.net/beta2/article/details/5014530) 1. I-match 2. shingliing 3. simhashing (locality sensitive hash) 4. Random projection 5.