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Difference between Document-based and Key/Value-based databases?

I know there are three different, popular types of non-sql databases. 2 Answers 2 ...
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How can I join multiple SQL tables using the IDs?

I have 4 different tables that I want to join. The tables are structured with columns as follows: 4 Answers ...
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Remove columns from DataTable in C#

I have a DataSet which I get a DataTable from that I am being passed back from a function call. It has 15-20 columns, however I only want 10 columns of the data. ...
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how to schedule a job for sql query to run daily?

I need to know how to make a SQL query run daily using a SQL Server Agent job, with minimum required configuration settings. ...
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How to kill zombie process

I launched my program in the foreground (a daemon program), and then I killed it with kill -9 , but I get a zombie remaining and I m not able to kill it with kill -9 . How to kill a zombie process? ...
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How do I escape reserved words used as column names? MySQL/Create Table

I am generating tables from classes in .NET and one problem is a class may have a field name key which is a reserved MySQL keyword. How do I escape it in a create table statement? (Note: The other problem below is text must be a fixed size to be indexed/unique) ...
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How to truncate string using SQL server

i have large string in SQL Server. I want to truncate that string to 10 or 15 character 6 Answers ...
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Is there an R function for finding the index of an element in a vector?

In R, I have an element x and a vector v . I want to find the first index of an element in v that is equal to x . I know that one way to do this is: which(x == v)[[1]] , but that seems excessively inefficient. Is there a more direct way to do it? ...
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How can I quantify difference between two images?

Here's what I would like to do: 22 Answers 22 ...
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VB.NET equivalent of C# property shorthand?

Is there a VB.NET equivalent to the C#: 3 Answers 3 ...