duplicates

Suppose I've data similar to following: index id name value value2 value3 data1 val5 0 345 name1 1 99 23 3 66 1 12 name2 1 99 23 2 66 5 2 name6 1 99 23 7 66 How can we drop all those columns like ( value , value2 , value3 ) where all rows have same values, in one command or couple of commands using python ? Consider we have many columns similar to value , value2 , value3 ... value200 . Output: index id name data1 0 345 name1 3 1 12 name2 2 5 2 name6 7 EdChum What we can do is apply nunique to calc the number of unique values in the df and drop the columns which only have a single unique value:

I'm trying to sum the values of rows two of which have duplicate values, the table I have is below: Table name (Customers) value years total 1 30 30 3 10 10 4 15 15 4 25 25 I would ideally like to finally have: value years total 1 30 30 3 10 10 4 40 40 I've tried using SELECT DISTINCT and GROUP BY to get rid of the duplicate row, also the join in the code below isn't necessary. Regardless both commands come to no avail. Here's my code too: SELECT DISTINCT value, years, SUM(customer.years) AS total FROM customer INNER JOIN language ON customer.expert=language.l_id GROUP BY expert, years; But

Hello I have table name FriendsData that contains duplicate records as shown below fID UserID FriendsID IsSpecial CreatedBy ----------------------------------------------------------------- 1 10 11 FALSE 1 2 11 5 FALSE 1 3 10 11 FALSE 1 4 5 25 FALSE 1 5 10 11 FALSE 1 6 12 11 FALSE 1 7 11 5 FALSE 1 8 10 11 FALSE 1 9 12 11 FALSE 1 I want to remove duplicate combinations rows using MS SQL? Remove latest duplicate records from MS SQL FriendsData table. here I attached image which highlights duplicate column combinations. How I can removed all duplicate combinations from SQL table? Try this DELETE

I am currently trying to set up a table with 6 clickable cels that allow for a input box to appear so you can add comments but I am getting a duplicated jQuery selector error and also through debugging my second function I found that .html() is not working either. Here is my code for the 6 functions; each of which are called when a specific cell is clicked: $("#mondayCommentLink").click(function (){ var mondayhtmls = $("#mondayComment"); var input = $("<input type='text' id='mondayCommentText' name='mondayCommentText' />"); input.val(data.days[0].comment); mondayhtmls.html(input); }); $("

I'm working on a back office of a restaurant's website. When I add a dish , I can add ingredients in two ways. In my form template, I manually added a text input field. I applied on this field the autocomplete method of jQuery UI that allows: Select existing ingredients (previously added) Add new ingredients However, when I submit the form, each ingredients are inserted in the database (normal behaviour you will tell me ). For the ingredients that do not exist it is good, but I don't want to insert again the ingredients already inserted. Then I thought about Doctrine events , like prePersist()

I am trying to merge (join) multiple data tables (obtained with fread from 5 csv files) to form a single data table. I get an error when I try to merge 5 data tables, but works fine when I merge only 4. MWE below: # example data DT1 <- data.table(x = letters[1:6], y = 10:15) DT2 <- data.table(x = letters[1:6], y = 11:16) DT3 <- data.table(x = letters[1:6], y = 12:17) DT4 <- data.table(x = letters[1:6], y = 13:18) DT5 <- data.table(x = letters[1:6], y = 14:19) # this gives an error Reduce(function(...) merge(..., all = TRUE, by = "x"), list(DT1, DT2, DT3, DT4, DT5)) Error in merge.data.table(..

I'm creating a Dictionary object, using IEnumerable 's ToDictionary() extension method: var dictionary = new Dictionary<string, MyType> (myCollection.ToDictionary<MyType, string>(k => k.Key)); When it executes, it throws the following ArgumentException : An item with the same key has already been added. How do I get it to tell me what the duplicate key is? Guffa Get the duplicate keys: var duplicateKeys = myCollection .GroupBy(k => k.Key) .Where(g => g.Count() > 1) .Select(g => g.Key); If your specific situation makes it okay to only insert one of a set of objects with duplicate Key properties