I was working on the Microsoft SQL Server (2008) Management Studio when I renamed some tables. After renaming I decided to edit the relationships and I got stuck with the following error
The existing relationship must have at least one pair of related columns No matter what I did, I could not discard the screen with this message.
To reproduce the error, use the following steps but take note that you will end up in an endless loop and you will be forced to kill the SQL Server process.
It seems there are times that computers get tired and decide to take a nap or maybe decide to stage a strike. How else would you explain a situation where a computer has been working without a hassle and suddenly you open the Control Panel and all you get is a blank screen staring at you?
Of late I have noted my laptop has been running slowly and I thought this was due to the number of applications installed.
Click the plus sign (+) to expand `Internet Information Services`, `World Wide Web Services` and `Application Development Features`. Under `Application Development Features`, make sure `NET Extensibility`, `ASP.NET`, `CGI, ISAPI Extensions`, `ISAPI Filters` and `Server-Side Includes` are selected. Download PHP compressed files. Note that Non-thread-safe build of PHP is recommended when using IIS.
Extract the contents of compressed file to the hard disk. I this case I will extract to C:\php
A MAC address is a unique identifier assigned to a network interface card (NIC). The MAC is hard-coded to the NIC at the time of manufacture.
How do you get the MAC address for a computer?
Open Windows Command Prompt and type the following command:
ipconfig /all This will display a result similar to the following:
C:\>ipconfig /all Windows IP Configuration Host Name . . . . . . . .
I was testing an application that was set to use port 8080. The application failed to start up throwing an exception that the port was in use.
To identify the process tying up port 8080, I opened windows command prompt and typed the following command.
netstat -aop tcp netstat is useful for displaying active connections and ports on which a computer is listening.
Description of parameters used:
a - Displays all TCP and UDP connections and listening ports
