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LINQ's Distinct() on a particular property
... Very nice answer! Realllllly helped me in Linq-to-Entities driven from a sql view where I couldn't modify the view. I needed to use FirstOrDefault() rather than First() - all is good.
– Alex KeySmith
May 16 '12 at 14:14
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Show constraints on tables command
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I use
SHOW CREATE TABLE mytable;
This shows you the SQL statement necessary to receate mytable in its current form. You can see all the columns and their types (like DESC) but it also shows you constraint information (and table type, charset, etc.).
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What does LINQ return when the results are empty
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In Linq-to-SQL if you try to get the first element on a query with no results you will get sequence contains no elements error. I can assure you that the mentioned error is not equal to object reference not set to an instance of an obje...
How to change a PG column to NULLABLE TRUE?
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Not the answer you're looking for? Browse other questions tagged sql postgresql nullable or ask your own question.
MySQL load NULL values from CSV data
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MySQL manual says:
When reading data with LOAD DATA
INFILE, empty or missing columns are
updated with ''. If you want a NULL
value in a column, you should use \N
in the data file. The literal word
“NULL” may ...
Is there a way to take a screenshot using Java and save it to some sort of image?
...mport java.net.Socket;
import java.net.SocketTimeoutException;
import java.sql.SQLException;
import java.text.DateF
ValidateRequest=“false” doesn't work in Asp.Net 4
...the problem, it's what you do with it. It can be perfectly valid to accept SQL, HTML, or JavaScript code as input to your app, as long as you are encoding/escaping it properly before you output it or store it in your database.
– Jordan Rieger
Aug 2 '12 at 17:36...
What static analysis tools are available for C#? [closed]
...give rise to common attack
vectors such as Cross-Site Scripting
(XSS), SQL Injection and XPath
Injection.
I used an early beta and it did seem to turn up a few things worth looking at.
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What is the best data type to use for money in C#?
... 10000" on the way out. This is the storage mechanism used by Microsoft's SQL Server, see http://msdn.microsoft.com/en-au/library/ms179882.aspx
The nicity of this is that all your summation can be done using (fast) integer arithmet
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock'
I installed MySQL on Mac OS X Mountain Lion with homebrew install mysql , but when I tried mysql -u root I got the following error:
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