remove duplicate words

Duplicate data deletion (De-duplication, DDD) is one of the advanced features of networked storage devices, which can effectively reduce the storage space occupied by duplicate data and increase the space utilization of storage devices. The data de-duplication feature for NetApp filer is called a-sis. When applying the command line in the following example, replace the/vol/vol1 with your own volume name.

Remove duplicate values from the List (three solutions)Public static void main (string [] ARGs ){String [] AR = {"DD", "C", "DD", "FF", "B", "E", "E "};Arraylist list = new arraylist ();For (INT I = 0; I List. Add (AR [I]);}System. Out. println ("before running :");For (INT I = 0; I System. Out. Print (list. Get (I) + "");}System. Out. println ();/* Method 1 *//*** The set method removes

1. Remove adjacent duplicate data rows $ Cat data1.txt | uniqOutput: Beijingwuhanbeijingwuhan 2. Remove all duplicate data rows $ Cat data1.txt | sort | uniqNote: Only the uniq command removes the adjacent duplicate data lines. If sort is used, all

row_num > 1Method two to remove the weight according to a single condition:SQL code Delete From table where primary key ID not in ( Select Max(primary key ID) from table group by need to go to heavy fields having count (need to go to the heavy field) >=1 ) [SQL]View Plaincopy Delete from table where primary key ID not in ( Select Max (primary key ID) from table group by need to go t

[Conversion] Java list set to remove duplicate data 1. Loop all elements in the list and delete duplicates public static List removeDuplicate(List list) { for ( int i = 0 ; i 2. Use hashset to remove duplicate elements public static List removeDuplicate(List list) { HashSet h = new HashSet(li

To remove duplicate row data from a table, you may immediately think of using the DISINTCT keyword. However, DISINTCT can only remove rows with the same columns in the table, if you need to remove rows with multiple fields in the table (that is, some are the same and some are different), what should you do? After years

returning all values that do not record the record. The reason is that distinct can only return its target field, but cannot return other fields. This problem has plagued me for a long time. If distinct cannot solve this problem, I only need to use double loop query to solve it, this will undoubtedly directly affect the efficiency of a station with a large data volume. So I spent a lot of time studying this problem, and I couldn't find a solution on the Internet. During this period, I pulled Ro

Remove Duplicate LettersGiven a string which contains only lowercase letters, remove duplicate letters so this every letter appear once and only O nCE. You must make sure your result are the smallest in lexicographical order among all possible results.Example:Given"bcabc"Return"abc"Given"cbacdcbc"Return"acdb"https://le

Group group to remove duplicate data /*** Erase duplicate import data from the same topic* @author Tanteng* @date 2014.07.27*/Public Function fuck_repeat () {Set_time_limit (0);$sql = "Select" id ' from ' v95_special_content ' GROUP by ' specialid ', ' Curl ' has COUNT (' curl ') >1 ";$result = $this->db->query ($sql);while ($r = Mysql_fetch_assoc ($result)) {$i

Tags: mysql distinctAlthough distinct is a syntax for SQL and does not belong to MySQL, here is an example of MySQL.After so many years of distinct, incredibly has been wrong. Always thought that distinct is the removal of duplicate fields, originally it is to remove duplicate records.A repeating record is a record in which all fields are the same after distinct.

Remove duplicate data by day. If the value is 0, 0 is used. Otherwise, the maximum value is used. If the value is 0 Test data: mysql> select * from t2; + ---- + -------- + --------------------- + ---------- + | id | userid | inputDate | infoStatus | + ---- + -------- + --------------------- + ---------- + | 1 | 1 | 00:00:00 | 20013 | 2 | 1 | 00:00:00 | 0 | 3 | 2 | 00:00:11 | 20015 | 4 | 2 | 00:00:22 | 20013

There is a matrix in the form of a two-dimensional array. There are numbers and strings in each row of the matrix. How do I remove the same rows? The same row indicates that the values at all latitudes are the same. The solution I came up with is as follows: Concatenate the values of each row into a string and use the index of the row vector as the key. The time complexity should be O (n ). Traverse hashtable to obtain the corresponding index, that

In linux, when removing duplicate lines of files and collecting statistics on some data, there are usually some duplicate lines in the files. how can we remove these duplicate lines? With the powerful awk, you can easily remove duplicates from the file content line. Awk amp

Given a sorted array, remove the duplicates in place such, all element appear only once and return the new L Ength.Do the allocate extra space for another array, and you must does this on place with constant memory.For example,Given input Array A =[1,1,2],Your function should return length =2, and A is now[1,2].Test instructions: Remove duplicate elements, if

Massive Data (more than one million data records), some of which have the same fields and some of which are the same. How can we efficiently remove duplicates? If you want to delete the data of the same Mobile Phone, phone (offline phone), and email at the same time, you have always used this statement to deduplicate the data: deletefrom table whereidnotin (selectmax (id) f Massive Data (more than one million data records), some of which have the same

Hashmap nocommap = new hashmap ();Iterator While (ITER. hasnext ()){String key = ITER. Next ();Arraylist list = (arraylist) nocomhm. Get (key );List = removeduplicatewithorder (list );Nocommap. Put (Key, list );} /* Remove duplicate values from the list */ Public static arraylist removeduplicatewithorder (arraylist arllist ){Set set = new hashset ();List newlist = new arraylist ();For (iterator iter = arlli

the data that name does not repeat, then you must use distinct to remove the redundant duplicate records.select DISTINCT name from tableThe resulting results are:NameACIt seems to be working, but what I want to get is the ID value? Change the query statement:SELECT DISTINCT name, ID from tableThe result would be:ID Name1 A2 b3 C4 C5 bWhy doesn't distinct work? The role is actually up, but he also functions

records, only one record is retained, but it is often used to return the number of records that do not repeat, instead of returning all values of records that do not repeat. The reason is that distinct can only return its target field, but cannot return other fields. If distinct cannot solve the problem, I only use double loop query to solve the problem, this will undoubtedly directly affect the efficiency of a station with a large data volume.Let's take a look at the example below:The table st

We can use the keyword distinct to remove duplicate elements in the result set, but this does not delete repeated elements in the database.If you want to delete data with repeated fields in a data table, it is a good way to use a temporary table as a transfer station.Suppose we want to delete extra rows of data with duplicate values in blogurl fields in the data

Repeated rows usually do not cause problems, but sometimes they do. In this case, you don't have to spend an afternoon preparing filters for them. The uniq command is a handy tool. Learn how it saves your time and energy. After sorting, you will find that some rows are duplicated. Sometimes this duplicate information is not required. you can remove it to save