Unfortunately the hard disk of my system is damaged. I am trying to recover my database, but it cannot be attached again to SQL management studio 2005. The error is     myfile.mdf is not a primary database file. (SQL server , error 5171)
Unfortunately hard disk of my system is damaged, now I recovered my database. But it cannot be attached again to SQL management studio 2005. The error is:  myfile.mdf is not a primary database file. (SQL server , error 5171)
When to answer vs when to just comment How do you know if something you want to say should be an answer or just a comment?  I assumed that anything that answers the question should be in an "answer" field, and clarifications should be under "comment". But I found this question () in the English Stackexchange site.  The original question asks for words related to the word "chain" and all the answers so far were provided via comment to the original question, instead of in a separate answer field.  Is this the recommended way to answer a question that requires only one-word answers? Or should the comments to the original question be converted to answers instead? Mountain Bike on Paved Roads I'm an occasional biker. I bought a mountain bike (nothing fancy) with the idea that I might use it off-road or on mountain trails (of which there are many here in Calgary). However, since I've bought it I've done nothing but bike in the city on streets and paved bike trails.  Is there anything worth doing to my bike to convert it to something more suited to urban biking? In particular, the tires have me wondering; they have large rubber off-roading lugs that surely aren't doing me any favors on pavement. I'm not looking to spend a tons of money on a retrofit, but will do so if its worthwhile. Internet Accounts spontaneously forgets passwords and I can't reauthorize them I've had this problem before, but I was able to resolve it that time. macOS 10.13.4, everything up to date. Yesterday, Internet Accounts forgot my LinkedIn password and would not reauthenticate. Today, it forgot my Facebook password.   I've tried:   App specific password. Removing the account and re-adding it. Turning off 2-factor authentication. Deleting associated entries from Keychain. Logging out of iCloud, deleting Keychain entries, removing and re-adding the account, then logging back in.   First of all, what the hell—why does this keep happening?! Secondly, what else can I do to fix this short of reinstalling macOS? Is the W statistic output by wilcox.test() in R the same as the U statistic? I've recently been reading about the Mann-Whitney U test. It turns out that to carry out this test in R you actually need to run a Wilcoxon test!  My question: is the W statistic of wilcox.test in R identical to the U statistic? Parenthesize what I have highlighted What is special about square numbers here? I read about how to enable and disable services in Ubuntu and it seems that there are different possibilities to manage them.  The first method I found is update-rc.d to add new services to startup, which aims on the /etc/init.d folder and its contents.  The other one I found is to edit .conf files in the /etc/init folder.  What's the recommended way to enable / disable / add services and why?  Could you please give a short bulletproof step by step example on how to add a service in Ubuntu and enable and disable it? Using sed what is an one liner to print the first n characters?  I am doing the following:  grep -G 'defn -test.*' OctaneFullTest.clj  | sed .... Using media queries in Lightning component Does the speed of light vary in non-inertial frames? How to fix the MBR for Windows 7? I have installed Ubuntu as dualboot with Windows 7. Now I'm no longer using Ubuntu so i removed the Ubuntu partition and added the unallocated space to my Windows 7 partition. But after I restart my computer it goes directly to the error:   error: unknown filesystem grub rescue &gt;   I don't have the original Windows CD to fix the MBR. Is there a way to fix this error without using the Windows CD? I'm new to blender and have been studying and starting with low poly modeling. Recently I changed my GPU from a GTX 960 to an RX 580. I uninstalled the drivers and installed new ones using DDU.  Problem: Rendering using OpenCL produces these unwanted lines. The attached image is a product of CPU + GPU render then the GPU only render, respectively. When I render using only the CPU the results are as expected, no unwanted black vertical lines, using only the GPU adds more lines on the image.  Any help is appreciated, thank you! Does anyone know if there are any video formats (besides the HUGE uncompressed avis) that you can render in that maintain the alpha channel? (i.e. for after FX etc.)   I used to use quicktime, but that's no longer an option.  I know you can render in png. or other image formats, but video is significantly smaller, and I often work on machines with less space &amp; resources. Star vs Heart icon to represent save as a favourite I am working on a mobile app that involves the user saving a favourite location. I wanted to use an icon to represent that feature, but I'm not sure which one is better – a star or a heart icon.  Some say heart icon tends to increase the rate of productivity, and some say they are used to a star icon to 'save' or 'bookmark' something.  What do go you guys think? Switching to different font size(s) locally When is $\sin(x) = \cos(x)$? How do I solve the following equation?  $$\cos(x) - \sin(x) = 0$$   I need to find the minimum and maximum of this function:   $$f(x) = \frac{\tan(x)}{(1+\tan(x)^2}$$  I differentiated it, and in order to find the stationary points I need to put the numerator equal to zero. But I can't find a way to solve this trigonometric equation. Copy files from a list to a folder Console flashes on launching, then closes (ms-windows) Swing GUI doesn't wait for user input CAML query daterange not working