export-to-csv

问题 Suppose that df is a dataframe in Spark. The way to write df into a single CSV file is df.coalesce(1).write.option("header", "true").csv("name.csv") This will write the dataframe into a CSV file contained in a folder called name.csv but the actual CSV file will be called something like part-00000-af091215-57c0-45c4-a521-cd7d9afb5e54.csv . I would like to know if it is possible to avoid the folder name.csv and to have the actual CSV file called name.csv and not part-00000-af091215-57c0-45c4

问题 Hi I have been looking for days on how to export my database as a xml or text file but cant seem to find what I am looking for. All the tutorials and code snipets I have come across dont really seem to explain what I am looking for. Does anybody know of any tutorial or site that explaines how I should export in this fasion? 回答1: Check following http://mgmblog.com/2009/02/06/export-an-android-sqlite-db-to-an-xml-file-on-the-sd-card/ Export sqlite database file into XML and then into Excel

问题 I need to Export Data displayed in a Table to CSV Format. I have tried lot many things but couldn't get it working for IE 9 and above. I have created a dummy fiddle with my code. var data = [ ["name1", "city1", "some other info"], ["name2", "city2", "more info"] ];//Some dummy data var csv = ConvertToCSV(data);//Convert it to CSV format var fileName = "test";//Name the file- which will be dynamic if (navigator.userAgent.search("MSIE") >= 0) { //This peice of code is not working in IE, we will

问题 I am trying to create this statement into a function: \copy aux("nombre") TO '/home/david/lugares.csv' delimiters ';'; So I do the next: CREATE OR REPLACE FUNCTION crearcsv() RETURNS void AS $BODY$ DECLARE STATEMENT TEXT; BEGIN RAISE NOTICE 'CREAR CSV'; STATEMENT:= '\copy aux ("nombre") TO ''/home/david/lugares.csv'' delimiters '';'';'; RAISE NOTICE '%',STATEMENT; EXECUTE STATEMENT; END;$BODY$ LANGUAGE plpgsql VOLATILE COST 100; But I get the next when I call to the function: NOTICE: \copy

问题 I use PostgreSQL 9.4.1 My query: copy(select * from city) to 'C:\\temp\\city.csv' copy(select * from city) to E'C:\\temp\\city.csv' ERROR: relative path not allowed for COPY to file ********** Error ********** ERROR: relative path not allowed for COPY to file SQL state: 42602 回答1: As with this case, it seems likely that you are attempting to use copy from a computer other than the one which hosts your database. copy does I/O from the database host machine's local file system only. If you have

问题 I have a set of large data files (1M rows x 20 cols). However, only 5 or so columns of that data is of interest to me. I figure I can make things easier for me by creating copies of these files with only the columns of interest so I have smaller files to work with for post processing. My plan was to read the file into a dataframe and then write to csv file. I've been looking into reading large data files in chunks into a dataframe. However, I haven't been able to find anything on how to write

问题 I have a set of large data files (1M rows x 20 cols). However, only 5 or so columns of that data is of interest to me. I figure I can make things easier for me by creating copies of these files with only the columns of interest so I have smaller files to work with for post processing. My plan was to read the file into a dataframe and then write to csv file. I've been looking into reading large data files in chunks into a dataframe. However, I haven't been able to find anything on how to write

问题 I am generating an CSV file in php. I need to print the text in new line inside a cell(I can do this in excel using Ctrl + Enter or Alt + Enter ). For that I tried using '\n' , '\r' , but nothing helped. How can I achieve this? I am using yii extension ECSVExport to generate csv. I want an output like this: ID Value 1 A B 2 C 3 E FF G 4 X 回答1: Try this "\n" inside double quote 回答2: Use "\n" inside the cell value (wrapped in " ) and "\r\n" for your end-of-record marker. If your cell entry

问题 There are a lot of questions here to create a macro to save a worksheet as a CSV file. All the answers use the SaveAs, like this one from SuperUser. They basically say to create a VBA function like this: Sub SaveAsCSV() ActiveWorkbook.SaveAs FileFormat:=clCSV, CreateBackup:=False End Sub This is a great answer, but I want to do an export instead of Save As . When the SaveAs is executed it causes me two annoyances: My current working file becomes a CSV file. I'd like to continue working in my

问题 Say my json is like this: var readyToExport = [ {id: 1, name: 'a'}, {id: 2, name: 'b'}, {id: 3, name: 'c'} ]; How can I export this JSON into CSV or Excel file in Angular2? The browser that I'm using is Chrome. Maybe Angular2 is not relevant, however, is there any third party plugin that can be injected in Angular2 and perform this task? 回答1: The fact that you are using Angular isn't all that important, though it does open up for some more libs. You basically have two options. Write your own