delete-row

问题 I'm trying to compare two csv files (fileA and fileB), and remove any rows from fileA that are not found in fileB. I want to be able to do this without creating a third file. I thought I could do this using the csv writer module but now I'm second guessing myself. Currently, I'm using the following code to record my comparison data from file B: removal_list = set() with open('fileB', 'rb') as file_b: reader1 = csv.reader(file_b) next(reader1) for row in reader1: removal_list.add((row[0], row

问题 I am going to implment a multi delete (via select boxes) view in django. I know there's a view in django.contrib.admin.actions but I can't port this to frontend. Should I assign object id's in the form and POST these to my delete view and then use .delete() ? I haven't been programming before, and Django is the framework I start my programming adventure. I was looking for example (for Django view + html) but couldn't find any. 回答1: Using a modelformset and manually rendering the form with

问题 I'm using Oracle 10g Express and trying to delete records from tables with bi-directional constraints. I'm trying to un-thread hundreds of tables and dependencies generated via Hibernate (which can't be changed at this point), but here is an extremely simplified example: create table TableA (id number(19,0) not null, ..., rTableA_id number(19,0), primary key (id)); create table TableB (id number(19,0) not null, ..., rTableB_id number(19,0), primary key (id)); alter table TableA add constraint

问题 I'm working at android 2.1 ContactContract, when I had not set account(for example: gmail account) to android emulator then, new a contact, but could not delete this contact at DB. ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>(); String[] args = new String[] {id}; ops.add(ContentProviderOperation.newDelete(Data.CONTENT_URI) .withSelection(Data.CONTACT_ID + "=?", args) .build()); ops.add(ContentProviderOperation.newDelete(RawContacts.CONTENT_URI)

问题 I want to delete certain rows in a data frame when the number of rows with the same index is smaller than a pre-specified value. > fof.6.5[1:15, 1:3] draw Fund.ID Firm.ID 1 1 1667 666 2 1 1572 622 3 1 1392 553 4 1 248 80 5 1 3223 332 6 2 2959 1998 7 2 2659 1561 8 2 14233 2517 9 2 10521 12579 10 2 3742 1045 11 3 9093 10121 12 3 15681 21626 13 3 26371 70170 14 4 27633 52720 15 4 13751 656 In this example, I want each index to have 5 rows. The third draw (which is my index) has fewer than 5 rows

问题 I am running a report of employees who charge time to different codes. The report gives me the following columns: Emp# / Emp Name / Rate / TermDate If the employee has left, then there is a value in the TermDate column. Because the value in the cell could be any date, I want to write a macro that will search the list and delete any row in which the value in the fourth column is NOT blank. I've found several examples of how to delete a row based on blank cells, or based on certain values, but

问题 I am trying to delete a single row using onLongClick of list item but sometime it deletes the row and sometimes doesn't. Maybe I am passing the wrong id to it I don't getting what actually problem is. I have tried some code and I am trying from last 2 days but unable to resolve this. Below is my code. @Override public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, final long id) { AlertDialog.Builder alert = new AlertDialog.Builder(FavouriteListActivity.this);

问题 I wrote a trigger that runs before a row is deleted that updates a table summarizing the data from this table. The trigger works well when I delete a single row at a time. However, if I were to delete multiple rows at once with a statement like DELETE FROM myTable WHERE id BETWEEN 1 and 100; Will the trigger completely run on the first row before the next row is deleted or will the triggers run all at the same time? 回答1: The trigger will completely run for every single row, see Trigger FAQ A

问题 I have two tables. Those tables have two relation between them. Table 1 * ID_XPTO (PK) * Detail Table 2 * ID_XPTO (FK) (PK) * ID_XPTO2 (FK) (PK) Those two relations exists. Table 1 -< Table2 Table 1 -< Table2 My question is that I need to delete some row in table 1. I'm currently doing, declare @table Table (xptoTable2 int) insert into @table select ID_XPTO2 from Table2 where ID_XPTO = @ID_XPTO delete from Table2 where ID_XPTO = @ID_XPTO delete from Table where ID_XPTO in (select

问题 I'm trying to delete just one data from my DB, but, when I write the command I keep getting that there's some syntax error, could you tell me where is the error? This are the commands I've tried: DELETE FROM database_userprofile WHERE user.username = 'some'; ERROR: syntax error at or near "." LINE 1: DELETE FROM database_userprofile WHERE user.username = 'some'... DELETE FROM database_userprofile USING database_user WHERE user.username="some"; ERROR: syntax error at or near "." LINE 1: ...