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How do I limit an iOS app only to 4 inch screen devices? Software Name: Oracle SQL Developer Version 17.2.0.188  I have three tables: orders, order_details, and products.  I wanted to run a query to update units_in_stock in the products table based on quantity in order_details, where the associated orders row has been marked as shipped, and has a shipping date.  Here's what I tried:  UPDATE Products SET (Products.Unit_In_Stock = Products.Unit_In_Stock - Order_Details.Quantity) INNER JOIN (     Orders INNER JOIN Order_Details ON Orders.Order_ID = Order_Details.Order_ID     ) ON Products.Product_ID = Order_Details.Product_ID WHERE (         ((Orders.Shipped_Date) IS NOT NULL)         AND ((Orders.This_Order_Was_Shipped) = "YES")         );   When I run this, I get:  Error at Command Line : 1 Column : 45   Line 1, Column 45 is the equal sign in the very first statement that said  Products.Unit_In_Stock = Products.Unit_In_Stock - Order_Details.Quantity   Can you help me get this working? Ways to put numbered balls in boxes no box being empty I know the formula for putting $n$ identical balls in $r$ different boxes such that each box has at least 1 ball, but what is the formula for putting $n$ different balls in $r$ different boxes, no box being empty?  Thanks! If $(X,d)$ is a complete metric space and $A$ is closed then show that for $x \in X$ there exists an element $a_0 \in A$ such that $d(x,A)=d(x,a_0)$ How can I make a deepcopy of a function in Python? How does the double strike mechanic interact with other mechanics like lifelink or trample? Welcome back message suggests to upvote questions and answers even when questions are locked I just opened a URL to a question on programmers.SE and got the message:     But the question was locked, so I couldn't do what it asked me to do.  I consider this to be a very minor edge case bug and it's likely not worth investing developer time into it. But since this  I guess it's worth reporting even if it's just for making you aware of it. What is a good package for displaying algorithms? I found this page with some examples:   I'm wondering which one to use. Any suggestions? I'm using other packages too so whichever is less likely to interfere with them is better for me. R: Trouble using SMOTE package "invalid 'labels'" Using SMOTE package from DMwR library. After loading the data frame, I try to perform sampling as follows :   crime_bal$target &lt;- as.factor(crime_bal$target) crime_bal &lt;- SMOTE(target ~ .,crime_bal,perc.under = 200, perc.over = 100)   But it always ends up to this error :   Error in factor(newCases[, a], levels = 1:nlevels(data[, a]), labels = levels(data[,  :    invalid 'labels'; length 0 should be 1 or 2 In addition: Warning messages: 1: NAs introduced by coercion  2: NAs introduced by coercion    Details of my dataset :   &gt; summary(crime_bal)      text               url            target    Length:6326        Length:6326        0:5994    Class :character   Class :character   1: 332    Mode  :character   Mode  :character   Why do I always end up with the error? I'm running Bash scripting, but sometimes I get confused which of these commands I use belong to who. Sometimes man xxx works, sometimes doesn't, so I use --help or info, mostly one of these works to show description of the command. Can anyone tell me how I would know what command belongs to what? Bash builtin, GNU utility, etc. Does the verb &quot;provide&quot; always have to be used with &quot;with&quot;? For example,  Can you provide me with some good examples? Can you provide me some good examples? Can you provide some good examples?  I suppose it's a transitive verb, isn't it? Moreover, is the following type of usage correct?  You should provide food for your dog before you go on vacation.  If you could give me some good examples regarding &quot;provide&quot; with different types of usage, I'd appreciate that. I am trying to recall the name of a story I read when I was fairly young (maybe 20 years ago, but not sure how old the story is).    What I remember: A man acquires a set of creatures that he keeps in his house, I think in an aquarium.  They evolve over time, quickly, and think of him as their benevolent god. They build statues in his likeness.   Then, I believe some sort of accident happens, and the statues they build become a little less benevolent, which bothers him.  This pattern continues on with his cruelty increasing and their depiction of him becoming more cruel. I think my son was trying to guess the passcode! What do I do?  I can't wait 42 years! Problem :   Solve in $\mathbb N$ :   $8n+9\equiv 0\pmod{1163}$  The mathematics give me : $n=435+1163k$ , $k\in\mathbb N$   $1163$ is a prime number   $8n\equiv -9\pmod{1163}$   $8n\equiv 1154\pmod{1163}$   I don't know any ideas to complete my work ?   I have to see your hints Blender 2.79b is installed (from .exe) on my computer, currently. And I just downloaded the Blender 2.8 release candidate 2 (.zip).  When I create something in Blender 2.8, after I save it, I cannot open it again because the computer tries to open the blend file in version 2.79b. And manually selecting the 2.8 version from zip file does not work.  How can I open my blender 2.8 files? Do I have to delete Blender 2.79b? Discrete Probability: Four dice are thrown, what's the probability that... Four dice are thrown, what's the probability that:  a) None of them fall higher than three?  b) None of them fall higher than four?  c) That four is the highest number thrown?  So for a, I wanna think about the denominator first. There are 6 possible outcomes for each dice, and we have four dice. So we're technically picking r out of n objects, aka picking 4 possible values out of 6. So the denominator/sample space should be $6^4$ right?  Now this is where I'm getting tripped up. Order technically shouldn't count, because we only care about the quadruplets that don't have a value higher than 3. I might be wrong, maybe I am, but could someone explain a bit more? My professor stated that typically in the sample space/denominator, we want order to count.   So I'm trying to think of the numerator now, so we want to find the probability that no values appear higher than 3, so some events that can occur are: $(1, 1, 2, 3), (1, 2, 2, 3), (1, 1, 1, 1)$ etc. Again, I can't see why order should count here, because if we only are concerned about what appears rather than how they appear, then we can say $(1, 1, 2, 3)$ is equal to $(1, 2, 1, 3)$? So if order does not count, and we have replacement, then does this lead the case where we use $$\binom{n-1+r}{r}$$to find out the probability?   I'm pretty sure if I can do a), I could prob do b), but if someone could maybe lead me in the right direction for c) I would appreciate that too! Is spacetime discrete or continuous? Any point to downvoting already closed questions? That question of mine was closed a long time ago (relatively, to me at least).  However, from time to time I still get downvotes for it.  That got me thinking: is there any reason to still downvote closed questions? Inno Setup: How to manipulate progress bar on Run section? What does ` (backquote/backtick) mean in commands? I came across the following command:  sudo chown `id -u` /somedir   and I wonder: what is the meaning of the ` symbol. I noticed for instance that while the command above works well, the one below does not:  sudo chown 'id -u' /somedir