Clear column data

Cassandra CQL 3.2.1 Clear column data

I need to clear the data from a column in a table using CQL I've tried the following test on a single node and it works fine. But is this going to fly on many nodes and different replication factors? DROP KEYSPACE IF EXISTS testColumnDrop; CREATE KEY

Distribute column data in multiple rows

I have data currently in my table like below under currently section. I need the selected column data which is comma delimited to be converted into the format marked in green (Read and write of a category together) Any ways to do it in SQL Server? Pl

Create a two-column data frame using column names

I have multiple lists similar to those below. a = c(1,2,3) b = c(4,5,6) c = c(7,8,9) I know I can create a 3x3 dataframe using cbind.data.frame. However, I would like to create a 2 column data frame, where rows 1-3 have a in column 1, rows 4-6 have b

How do I get a data frame on pandas where the columns are the following n-elements from another column data frame?

A very simple example just for understanding. I have the following pandas dataframe: import pandas as pd df = pd.DataFrame({'A':pd.Series([1, 2, 13, 14, 25, 26, 37, 38])}) df A 0 1 1 2 2 13 3 14 4 25 5 26 6 37 8 38 Set n = 3 First example How to get R - ddply to act on 2 columns in 3 columns data.frame

I am trying to use ddply to act on 2 columns in 3 column data.frame. I know I've done this before, but for the life of me I cannot get anything to work. Here's the example: func = function(x, y) { if(x>y) { x-y } else { 0 } } df = data.frame(name=c('

SQL Get column data in a single column

I have a table in which Employee Punches are saved. For each date for each employee there are columns in the table as Punch1, Punch2 till Punch10. I want all this Punch Columns data in a Single Column. e.g. If in a row i have dates stored in Punch1,

Browser Clearing Form Data

This question already has an answer here: How to prevent buttons from submitting forms 13 answers I have a form on a website and I am validating it using JS. The issue I have is, after the form has failed validation, the browser clears the data which

Can I delete single column data that uses its line ID using my procedure?

I have one special case in my sql server 2008. I want to delete single column data which is using ID of its row with the help of my procedure. How can i achive this can any one please help me?You say that you want to do If(Id=1001) delete Mycolumn fr

Clear user data or Clear cache on Phonegap android

How can I clear user data or clear cache using PhoneGap and Android? The code below does not work. Where should I make the changes; On the HTML side or on the Java side? Also I'm accessing an AJAX request and on the second attempt of a PUT method, th

The best way to display multi-column data in grid format in winforms?

What is the best way to display multi-columned data in a grid format using C# WinForms? Is it ListView or DataGridView?DataGridView is your best bet for simple grid display. However, if you are needing nested (collapsible/expandable) display for chil

SQL Server 2008 R2: Best way to export BLOB and other column data to the file system

I have read some arts about BCP or CLR code that will export BLOBs to individual files on the hard drive, but I need to BCP or CLR out the entire table data together (meaning the other columns which are character or integer or datetime data need to c

How to clear form data when refreshing in Firefox

I am writing a web page with a form on it but when I refresh the page the form does not clear the data like I want it to, this only happens in Firefox. Does anyone know how to get around this aside from using JQuery to go through and clear the forms

Check the separate value by ignoring the other column data

If I have a table with data like this : Col1 | Col2 | Col3 111 | a | 222 | b | 1 111 | | And I wish to select Distinct Col1 only from my temporary table then insert into another table.But with the table above , the second "111" will be selected

because of the transformation of a single column data frame into a vector after the subset

I have a single columned data frame structure. Based on a condition, I am subsetting the data frame during run time. I have observed that the data frame is being converted into a vector after subsetting. I have achieved the data frame structure back