I have following data  ID  Status            Order Date 1   to be validated    1    2013/02/18 14:24:55,085000000 1   to be modified     2    2013/02/19 10:37:29,641000000 1   to be validated    3    2013/03/15 14:42:31,913000000 1   in force           4    2013/03/20 09:57:14,839000000 1   in force           5    2013/03/22 15:41:46,683000000 1   in force           6    2013/03/26 09:50:53,312000000 1   in force           7    2013/03/26 10:00:27,461000000 1   in force           8    2013/03/27 11:03:02,981000000 1   in force           9    2013/03/27 16:28:25,405000000 1   closed            10    2013/03/28 16:16:30,152000000 1   closed            11    2013/03/28 16:16:30,199000000 2   pending            1    2013/02/19 10:07:15,177000000 2   pending            2    2013/03/26 11:48:23,800000000 3   to be validated    1    2013/02/20 15:03:23,771000000 3   to be validated    2    2013/02/27 13:45:43,505000000 3   to be modified     3    2013/02/27 13:49:08,845000000 3   refused            4    2013/02/27 13:53:36,543000000 3   refused            5    2013/04/10 12:14:04,946000000 3   refused            6    2013/04/10 12:14:04,961000000   for which I would like to group by ID but get whole row only for the max(order) in a group, i.e.  1   closed            11    2013/03/28 16:16:30,199000000 2   pending            2    2013/03/26 11:48:23,800000000 3   refused            6    2013/04/10 12:14:04,961000000   I tried a group by statement, but am not sure what aggregate function would yield required results, i.e. get correct values for the remaining coulmns (out of group scope):  SELECT   ID , STATUS , MAX(ORDER) , DATE FROM   .... GROUP BY    ID   How should correct query look like to achieve expected result?
Table:   UserId, Value, Date.   I want to get the UserId, Value for the max(Date) for each UserId. That is, the Value for each UserId that has the latest date. Is there a way to do this simply in SQL? (Preferably Oracle)  Update: Apologies for any ambiguity: I need to get ALL the UserIds. But for each UserId, only that row where that user has the latest date.
What is the regular expression for a decimal with a precision of 2?  Valid examples:  123.12 2 56754 92929292929292.12 0.21 3.1   Invalid examples:  12.1232 2.23332 e666.76   The decimal point may be optional, and integers may also be included. How do I install/update drivers on Debian 9? I just installed Debian 9 on my laptop, however Wifi isn't working and I'm not sure if my graphic card is either. I'm sure that it's just a lack of drivers, but I've never actually had to update drivers on Linux before. So how do I do that? Does entropy increase or decrease as our Universe is expanding? Scientists say that entropy of our universe is increasing as it is expanding and our universe is cooling down gradually from the time of its birth. If something is getting cooler and cooler, then how can it become more random (entropy increase) with the passage of time? According to laws of thermodynamics, at absolute zero temperature, the entropy is zero. That means as we go down and down to the temperature scale entropy must decrease, but why is it not happening in the case of our universe? 101 positive integers placed on a circle A Pigeonhole Principle problem:     101 positive integers are placed on a circle whose sum is 300. Prove   that it is possible to choose from these numbers some consecutive   numbers whose sum is equal to 200.   (I don't know if the word 'consecutive' is appropriate in this case ,I mean that these numbers follow each other on that circle) Prove that for any positive integer $n$, $$2\sqrt{n + 1} − 2 \le 1 +\frac 1 {\sqrt 2}+\frac 1 {\sqrt 3}+ \dots +\frac 1 {\sqrt n} \le 2\sqrt n − 1$$ Progress I think Riemann sum should be used for the middle term. I got the limit as $n\to \infty$ of the function inside using Riemann sum but what I cannot get are the lower and upper bound. The Android app crashes when trying to upload a picture from my phone How can I kill a thread? without using stop(); I want to make a full focus on the body, for example: I need to have a clear focus on the each balls in the photo. I used just single point focus.    In this picture I used:   shutter speed: 8 aperture: F/4 ISO: 200 2 flashes, one in the right and one on the top of project camera: nikon d300s lens : 105mm micro 2.8   Thanks Exact relationship between electric field and intensity I often see $I(t)\propto |E(t)|^2$. What is the exact form ? Which constants are missing to make this an equality and why are they so often omitted ? Showing that $\sum_{i=1}^n \frac{1}{i} \geq \log{n}$ I have been trying to prove this by induction on $n\in \mathbb{N}$, but this approach seemed to get me nowhere. I have a suspicion it might be necessary to express $\log{n}$ as $\int_1^n 1/x\text{ }dx$, but I could not build a rigorous argument from that.  Any help greatly appreciated! What is the difference between the dashed and solid attack bars? I was flipping through my Pokemon list to see which kind of attacks they had, and I notice there was a small different between the attacks. Some attacks contained a dashed blue bar where as others contained a solid blue bar.   What is the difference and significance between the two? How to extrude and scale with an even offset? So why did the price tank all of a sudden and then came back to normal? What does it mean? Gradient of $a^T X b$ with respect to $X$ How can I find the gradient of the term $a^TXb$ where $X$ is a $n \times m$ matrix, and $a$ and $b$ are column vectors.  Since the gradient is with respect to a matrix, it should be a matrix.  But I do not have a clue on how to derive this gradient.   Any help ? How to use Cubic to create a custom Ubuntu live CD image? I'm used to creating Java Edition Minecraft maps, where NBT can be used to set many different block, item, and entity properties, like an item's CanPlaceOn/CanDestroy list, a chest's items, and more! To open my maps up to more players, I've started creating maps on Minecraft Bedrock Edition as well. But NBT is inaccessible from commands in BE, which I knew before, but didn't know how much of a problem I would have creating these complicated command chains. One of the things that I've always been doing is giving players items with custom item names, lores, enchantments, and other properties. But there is a problem. All this would have been done in NBT in Java Edition. In Bedrock, NBT is inaccessible from commands, meaning the commands I used in JE don't work. Are my dreams crushed? GNOME 2 allows one to either save the session automatically or manually (i.e. save the session as it looks right now). This is a nice feature because it restores the various desktop states between logins (and system restarts):   which apps were open where (physically) on the desktop were they open what specific window sizes were these apps set to   Looking around, I can't find the feature in GNOME 3? Did I not look hard enough? Why does my item name not show up in 1.13? I am in 1.13 Pre-Release 7 trying to make a one command creation and I need an item with a specific name. The command I use is /give @p diamond_sword{display:{Name:"Sword of Power"}} and it gives my a diamond sword, but it doesn't have the name.   This is me running the command.   This is the command not working. How do I copy files using Windows Batch? Would a Bayesian admit that there is one fixed parameter value? In Bayesian data analysis, parameters are treated as random variables. This stems from the Bayesian subjective conceptualization of probability. But do Bayesians theoretically acknowledge that there is one true fixed parameter value out in the 'real world?'  It seems like the obvious answer is 'yes', because then trying to estimate the parameter would almost be nonsensical. An academic citation for this answer would be greatly appreciated.