duplicates

问题 This question already has answers here : Aggregate a data frame based on unordered pairs of columns (3 answers) Closed last year . For example, my data set is like this: Var1 Var2 value 1 ABC BCD 0.5 2 DEF CDE 0.3 3 CDE DEF 0.3 4 BCD ABC 0.5 unique and duplicated may not able to detect the duplication of row 3 and 4. Since my data set is quite large so is there any efficient way to only keep the unique rows? Like this: Var1 Var2 value 1 ABC BCD 0.5 2 DEF CDE 0.3 For your convince, you can use

问题 i have table like : id name description 1 foo 2 bar 3 foo i want update description with id of duplicated row . something like: id name description 1 foo duplicate in id (3) 2 bar 3 foo duplicate in id (1) How can i do this in Mysql 回答1: This query will return all duplicated ids with a comma separated list of ids that share the same name: select t1.id, group_concat(t2.id) from tablename t1 inner join tablename t2 on t1.id<>t2.id and t1.name=t2.name group by t1.id and this query will update

问题 I want to delete duplicated rows, so I used this select statement to find all duplicated rows. SELECT * FROM MY_CARD T1 INNER JOIN( SELECT IDCARD, YEAR FROM MYCARD GROUP BY IDCARD, YEAR HAVING COUNT(IDCARD) > 1 ) T2 ON T1.IDCARD = T2.IDCARD AND T1.YEAR=T2.YEAR WHERE T1.IDRODZ = 5 AND IDCARD=80; My result looks like that, but this is only short example, there are more duplicated records. ID IDCARD YEAR IDRODZ 1 80 2014 5 2 80 2014 5 3 80 2014 5 4 80 2015 5 5 80 2015 5 6 80 2015 5 I need delete

问题 I have an multidimensional array: Array ( [0] => Array ( [a] => 1 [b] => 2 [c] => 3 [d] => 4 ) [1] => Array ( [a] => 1 [b] => 5 [c] => 3 [d] => 4 ) [2] => Array ( [a] => 1 [b] => 2 [c] => 3 [d] => 4 ) ) Look at the first index (or zero) and third index (number two index), the values in a,b,c,d is equal 1,2,3,4. Assuming that the array is equal, or no different of them; my question is, how can I catch the array which equal, my purpose to show users about the value input duplicate, I have

问题 I am using Lucene Highlighter 2.4.1 for my application. I use the highlighter to get the best matching fragments, and display them. I make a call to a function String[] getFragmentsWithHighlightedTerms(Analyzer analyzer, Query query, String fieldName, String fieldContents, int fragmentsNumber, int fragmentSize). For example : String text = doc.get("MetaData"); getFragmentsWithHighlightedTerms(analyzer, query, "MetaData", Text, 5, 100); The function getFragmentsWithHighlightedTerms() is

问题 I have Datatable 1:-----------------------------should be like that: ID Name Lastname ID Name Lastname ------------------- ----------------------- 1 | koki ha 1 | koki ha ------------------- | ----------------- //merge Rows[0][0] 1 | lola mi | lola mi //with Rows[1][0] if the same ------------------- ----------------------- 2 | ka xe 2 ka xe how to replace "1" with "" or empty if is already exist? I spend for this for 2 hours but can't find the solution. I tried with linq but dont find the

问题 I have a table like so: Table eventlog user | user_group | event_date | event_dur. ---- ---------- --------- ---------- xyz 1 2009-1-1 3.5 xyz 2 2009-1-1 4.5 abc 2 2009-1-2 5 abc 1 2009-1-2 5 Notice that in the above sample data, the only thing reliable is the date and the user. Through an over site that is 90% mine to blame, I have managed to allow users to duplicate their daily entries. In some instances the duplicates were intended to be updates to their duration, in others it was their

问题 why create duplicate package when generate library greenado? this is generator private static final String PROJECT_DIR = System.getProperty("user.dir"); public static void main(String[] args) { Schema schema = new Schema(1, "com.greenado.db"); schema.enableKeepSectionsByDefault(); addTables(schema); try{ DaoGenerator n=new DaoGenerator(); n.generateAll(schema,PROJECT_DIR+ "\\app\\src\\main\\java"); } catch (Exception e) { e.printStackTrace(); } } 回答1: If you are using greenDAO 3.x Comment out

问题 So, my first question was answered correctly. For reference you can go here... How to fill the white-space with info while leaving the rest unchanged? In short, I needed this... POLYGON_POINT -79.750000000217,42.017498354525,0 POLYGON_POINT -79.750000000217,42.016478251402,0 POLYGON_POINT -79.750598748133,42.017193264943,0 POLYGON_POINT -79.750000000217,42.017498354525,0 POLYGON_POINT -79.750000000217,42.085882815878,0 POLYGON_POINT -79.750000000217,42.082008734634,0 POLYGON_POINT -79

问题 I have a table in my Postgres database where I forgot to insert a unique index. because of that index that i have now duplicated values. How to remove the duplicated values? I want to add a unique index on the fields translationset_Id and key. 回答1: It appears that you only want to delete records which are duplicate with regard to the translationset_id column. In this case, we can use Postgres' row number functionality to discern between duplicate rows, and then to delete those duplicates.