This is my query to find out primary key, foreign key in SQL Server 2008 R2:  select  *  from information_schema.table_constraints where constraint_type = 'PRIMARY KEY'   Know I need to select without primary key table in my database.  Thanks
A Google search spewed forth millions of hits on how to find tables without clustered indexed, the PK normally being the clustered index of a table. However, a table could easily have a natural key as a clustered index, and a non-clustered surrogate index, like an identity column.  How do I find all tables in a DB without a primary key defined? I have 245 tables in this DB: manual inspection is grossly inefficient.
On determinants and common divisors Would it be wrong to copy-paste questions from Quora? How does the basic RS Flip-Flop (also known as latch) works? How can a file be copied? 8 GB RAM installed, only 7.5 GB usable. Windows 7 64-bit I just upgraded my computer's RAM, adding another 4 GB to the computer.  Windows 7 acknowledges that 8 GB is installed, but says only 7.5 GB is accessible.  Any idea why? I thought since I had the 64-bit Professional version this wouldn't be an issue. Help finding the limit of $\lim_{n \to \infty}\prod_{k=1}^{n}\left(1+\frac{1}{n}f\left(\frac{k}{n}\right)\right)$. How to run firefox and firefox ESR simultaneously If i click on Ubuntu Software, it doesn't open. I have a fresh install of Ubuntu 20.04. I tried try to upgrade all packages, but it doesn't fix this problem.  If I try to run killall software-center there is no process with this name, and software-center returns command not found. If I try to reinstall it with apt I have these results:  $ sudo apt-get --purge --reinstall install software-center Reading package lists... Done Building dependency tree        Reading state information... Done Package oracle-java8-installer is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'software-center' has no installation candidate Let's say we have $x^2=25$ So we have two real roots ie $+5$ and $-5$.  But if we were to differentiate on both sides with respect to $x$ we'll have the equation $2x=0$ which gives us the only root as $x=0$.  So does differentiating on both sides of an equation alter it? If it does, then how do we conveniently do it in Integration by substitutions? If not then what exactly is going on here ? Is it possible to delete the "useless" apps pre-installed on my Mac? For example, I can't install package qcad because of error: "can't find qdict.h". How can I find the package which provides the file qdict.h so I can install the package qcad? What is a wave? List of generally believed conjectures which cannot all be true There are some conjectures which most leading experts believe in albeit no one can prove it yet. For example: $\mathcal{P} \neq \mathcal{NP}$, the Riemann hypothesis or the Collatz conjecture.  My question is whether there is a set of such conjectures which cannot all be true, eg. is a statement such as "Either $\mathcal{P} = \mathcal{NP}$ or the Riemann hypothesis is wrong" true? Are the tags shown in a particular order? I noticed that, sometimes, the tags I add to a question are not shown in the same order I wrote them, when the question is saved. Are they shown in a particular order? If they are, in which order they are shown? Powershell auto complete settings. I was wondering if there was anyway to change the way the current powershell autocomplete works. I have been using bash and had changed them to offer a few features that I'd like in my powershell experience.   Currently powershell as I'm writing a command with a folder it will tab autocomplete and also cycle through my folders. This works how I like but one feature that I miss is using partial matching of a command and hitting the up key and it would find that command that matches the rest of what I do.   So Id write 'echo test'  Then id write other commands and try 'ec' and tap up and 'echo test' would complete and not the last command I typed  Just wondering if there is anyway anyway to get this back? I'm getting this error:  ! Undefined control sequence. l.64 ...p(- \frac{E_j - E_i}{k_B T}) &amp; \quad \text                                                   {:  E_j &gt; E_i}\\ ?  ! Undefined control sequence. l.65     1 &amp; \quad \text                         {:  E_j&lt;E_i}\\ ?    which is from this:  \begin{equation}\label{eq:hop} w_{i,j}=w_0 exp(-2 \gamma R_{i,j})\left\{    \begin{array}{l l}     exp(- \frac{E_j - E_i}{k_B T}) &amp; \quad \text{:  E_j &gt; E_i}\\     1 &amp; \quad \text{:  E_j&lt;E_i}\\   \end{array} \right. \end{equation}   But I don't understand why I get the error. This is my header:  \documentclass[11pt]{iopart} %\newcommand{\gguide}{{\it Preparing graphics for IOP journals}} %Uncomment next line if AMS fonts required \usepackage{iopams} \usepackage{graphicx, wrapfig} \usepackage{fixltx2e} \graphicspath{{images/}} \DeclareGraphicsExtensions{.pdf,.png,.jpg,.gif} \makeatletter \g@addto@macro\@floatboxreset\centering %\def\@cite#1{\textsuperscript{[#1]}} \makeatother   And my class file is the standard IoP one from   Can anyone help me get read of this error? Lunch Meeting Probability for two person to meet in given 1 hour slot and none would wait more then 15 minute. Two friends who have unpredictable lunch hours agree to meet for lunch at their favorite restaurant whenever possible. Neither wishes to eat alone and each dislikes waiting for the other, so they agree that each will arrive at a random time between noon and 1 pm, and each will wait for the other for 15 minutes or until 1:00. What is the probability that the friends will meet for lunch on a given day? "Welcome to the Jones__": Plural or Plural Possessive? When making a welcome sign, what form of the name Jones would you use?  ("Welcome to the Jones__") What should I do when Ubuntu freezes? How can I download a distribution? Am I right in thinking that the Drupal distributions that I can download from  are a standard Drupal core download with a load of other stuff added at /profiles?  Anyone know if there are any plans to create a dev branch of distributions that would automatically update the core version that the distribution is running on? Currently it seems that the distribution runs on whatever core version its developer has chosen.  And how can I use distributions with Drush? Is there an equivalent to drush dl drupal that will download a specific distribution?  And, finally, is there any difference between an install profile and a distribution?