I want if Status column = 1  Check If there are rows in another table return 'Check' and If no rows return 'In DB'  SELECT ID, UserName, CASE [Status]     WHEN 1 THEN         if ((Select Count(*) From Logs_TB Where Logs_TB.UserName = Users_TB.UserName) &gt; 0)             'Check'         Else             'In DB'     WHEN 2 THEN 'Revision'     WHEN 3 THEN 'Sent' END AS StatusName FROM Users_TB CROSS JOIN Logs_TB     Edit 1:  I have Two Tables  in First Table. I want to get the following result for Column [Status]  if FirstTable.ColumnStatus = 1    if SecondTable.ColumnA = FirstTable.ColumnB Has Rows         'Check'    else         'In DB' else if FirstTable.ColumnStatus = 2    'Revision' else if FirstTable.ColumnStatus = 3    'Sent'     Edit 2    This is an example  I want Select All Rows From Employment Table  and I want to parse column Status to Column As "StatusName"  if Status  = 1 It has two values   First value Check if QualificationID and SpecializationID Has Rows in Table 'Vacancies' return 'Check'  and if no rows in Table 'Vacancies' return 'In DB'  if Status  = 2  'Revision'  if Status  = 3  'Sent'
How do I perform an IF...THEN in an SQL SELECT statement?  For example:  SELECT IF(Obsolete = 'N' OR InStock = 'Y' ? 1 : 0) AS Saleable, * FROM Product
This is a  about DNS server administration.   I have one hundred or so domains. All of these domains need to be configured identically, but it seems like a huge waste of time to have to configure a new zone and/or zonefile for every one of these domains. There has to be a better way to automate this!  I think I'm on to something...if I create a zone called ., or use some other feature in my DNS software to always return a specific IP when an A record is requested, this seems to get me pretty close to my desired end result. My server is responding authoritatively to the requests and it's so much easier to manage!  This was working great until nameserver validation software started checking these domains. I figured out that I can make most of the errors go away by adding NS records, but my software won't let me put more than one SOA record in the same zone file.  How do I work around this multiple SOA record problem? Can less be used without any comparison? Can I use &quot;less&quot; in sentences like this:  1 Why do we have so less number of students for this class? 2 My song collection is very less.  &quot;Small&quot; sounds better in both examples, but I would like to know if using &quot;less&quot; in these sentences is correct? Wavy stream of liquid How fast would someone have to run to run over water? I was thinking about Flash, the superhero, or the little boy in the Incredibles.   There is  that doesn't answer a lot. Especially, I don't think surface tension would help a lot for a human to run over water, I think one would have to build on the inertial effect of the water.  There is one empirical approach based on figuring out the speed at which bare-footed water skiing is done, but I wasn't able to find a decent number. Still the difference may be that a hypothetical runner would have to propulse herself over the water, which may or may not make the thing more difficult.  Hence, I raise the question here. Could anyone give me an explanation of the meaning of "get one's finger in the air" and the usage of it? Is there a way to replicate Nikon D3100 live view on my laptop screen? I own a Nikon D3100 and I need a way to see the live view of my camera on my laptop screen.  There must definitely be a way (I am not just aware of it). I have searched all around the web sites... I could not get a solution.  The Nikon Camera Control Pro 2 does not support D3100, and "Camera Control 5.1" connects and shoots remotely from a laptop but does not show live-view nor shoot in RAW.  There is a way of connecting my camera to a TV or monitor directly via an HDMI cable and getting the live view, but I want it displayed to my laptop screen. How to automatically restart a linux background process if it fails? Permission denied, are you root? I get this error whenever I try to install programs using the terminal:  home@ubuntu:~$ apt-get install myunity E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?   Also I'm unable to install updates using the terminal. Where is the Ubuntu file system root directory in Windows Subsystem for Linux and vice versa? What is the number of strings at size $n$ that is constructed from ${a,b,c,d}$ and there is an even num of $a$ Show that $g\circ f\equiv 0$ implies $\det Df\equiv 0$, where $g(x_1,...,x_n)=x_1^5+...+x_n^5$ Let $f:\mathbb{R}^n \rightarrow \mathbb{R}^n$ be a smooth function and let $g:\mathbb{R}^n \rightarrow \mathbb{R}$ be defined by $g(x_1,...,x_n)=x_1^5+...+x_n^5$. Suppose $g\circ f\equiv 0$. Show that $\det Df\equiv 0$.  I was going to start the solution from $n=2$ and then use induction on $n$.  So, for $n=2$, $f:\mathbb{R}^2 \rightarrow \mathbb{R}^2$ is a smooth function and $g:\mathbb{R}^2 \rightarrow \mathbb{R}$ where $g(x_1,x_2)=x_1^5+x_2^5$. Then $Df=\begin{pmatrix}   f_{x_1x_1} &amp; f_{x_1x_2}  \\   f_{x_2x_1} &amp; f_{x_2x_2}   \end{pmatrix}$  But now I am stuck in proving the result. Am I in the correct track? Can anyone plese give me a hint to continue?  Ok so since $g\circ f$ is $0$, the image of $f$ is the line $x_1+x_2=0$ which has no min, max or saddle.   If det$Df(x_0)&gt;0$ and $f_{x_1x_1}(x_0)&gt;0$ OR det$Df(x_0)&gt;0$ and $f_{x_1x_1}(x_0)&lt;0$, we have contradiction.   But if det$Df(x_0)&gt;0$ and $f_{x_1x_1}(x_0)=0$, then det$Df(x_0)=0$ or, det$Df(x_0)&lt;0$(Since $f_{x_1x_2}=f_{x_2x_1}$). So this is impossible.  If det$Df(x_0)&lt;0$ we have saddle and it is impossible.   So finally we conclude that det$Df(x)=0$ for all $x$. Am I correct? When, if ever, should voting override answer acceptance for answer sorting? Error validating geometry collection / multipolygon in PostGIS Since my previous questions were not answered I will try to ask again more precisely.  I previously had the Nvidia driver installed and working correctly.  Then the ubuntu software update did something which broke it.  In fact, it completely de-configured it so that the standard display driver is used when the computer reboots.  I would like to re-enable the existing Nvidia  driver without re-installing the Nvidia driver.  How do I do that?  This machine is no longer connected to the internet.  NOTE: I am not asking how to disable automatic updates in this question.  I asked that elsewhere (and it wasn't answered).  NOTE: I am not asking how to stop the Ubuntu software updater from breaking the Nvidia driver the next time it updates the system.  That would be nice to know, but I asked that already and did not receive the correct answer either.  NOTE: Please don't make this as duplicate simply because someone else asked a question about Ubuntu and the software updater.  Try to read the actual question and see how it's different and try to realize how annoying it is when users have to spend hours of their own time to correct the problems that other people causing by incorrectly designing software updaters. How to run "sudo apt-get update" through proxy in commandline? In my office i want to update and download through (wget) and here they are using proxy?  How can i do this by commandline? How to peel hard boiled eggs easily? This is one of the most annoying duties in the kitchen, for me.  What are yours tips and tricks to peel hard boiled eggs easily? Ubuntu16.04 boots into initramfs How are the number of views in a question calculated? I saw it's not just a page views number, because, if I press F5 several times, it won't increase the number of views.  They could store my IP address in a table, but wouldn't that make it slow? They would need to query a database one more time for each request. Getting the default text editor used in system I have used select-editor and I note that I am using /usr/bin/nano. Is this the default text editor I am using?  When I open text files, It opens with gedit  What command in terminal must be specified to get the default text editor that I am using, and have it returned to e in terminal? What does different focal length offer me?