Getting limited result from oracle in order
How do I limit the number of rows returned by an Oracle query after ordering?
When to use "respectively"? I have been wondering what it means when people use "respectively" in, before, and after sentences. For example:     We are looking for a babysitter to pick up and supervise our kids ages   6 and 3, respectively, on Monday and Friday.   I don't know if this person used it correctly, but if they did what does it mean? If they didn't use it properly what would be the proper usage?  Thanks in advance. Let $X$ and $Y$ be independent $N(0; 1)$ random variables. Let $Z = \sqrt{X^2+Y^2}$.  (a) Derive the marginal pdf of $Z$ and then using the marginal pdf to compute ${\rm E}[Z^2]$  (b) Can you propose a different way other than that in (a) to compute ${\rm E}[Z^2]$  (c) Compute ${\rm E}[Z]$.  This is the whole question that I was asked. I can do (c) but I don't know how to find the marginal pdf of $Z$ with the given information and can't seem to find any formulas. Any help would be appreciated. probability of $k$ boxes contain exactly $1$ ball Why does pgfplots plot functions only until x = 5 and y = 5, but not any further?    \documentclass{article}  \usepackage{tikz} \usepackage{pgfplots}  %%%&lt; \usepackage[active,tightpage]{preview} \PreviewEnvironment{tikzpicture} \setlength\PreviewBorder{5pt} %%%&gt;  \begin{document} \begin{tikzpicture} \begin{axis}[samples=100,ymin=0,ymax=10,xmin=0,xmax=20]  \addplot [thick] plot  (\x,  {1/(1 + exp(-0.6*(\x - 12)))}); \addplot plot (\x, {\x});  \end{axis} \end{tikzpicture} \end{document} I want it to know how to convert string field values to integer values in QGIS Dufour... there are numbers and strings in the same field, when I use toreal(string) it stops and it won´t create the field. mariadb Unknown system variable 'server_uuid' Im trying to setup replication between mariadb(10.1.31-MariaDB - MASTER) and mysql(5.7.12-log - SLAVE). After executed the start slave, I got the below error.     Fatal error: The slave I/O thread stops because a fatal error is   encountered when it tries to get the value of SERVER_UUID variable   from master.   Then I tried to get the value of master_uuid.  MariaDB [(none)]&gt; show variables like '%server_uuid%'; Empty set (0.00 sec)   Then tried to setup this in mysql prompt.  MariaDB [(none)]&gt; set global  server_uuid = 11123c25-cac0-3523-8089-4c54d9b46f33; ERROR 1193 (HY000): Unknown system variable 'server_uuid'   And also I tried to setup auto.cnf in data directory.  [auto] server_uuid = 11123c25-cac0-3523-8089-4c54d9b46f33  chmod 644 auto.cnf   But still im getting the fatal error is encountered when it tries to get the value of SERVER_UUID variable from master. Frequency of the sound when blowing in a bottle I'm sure you have tried sometime to make a sound by blowing in an empty bottle. Of course, the tone/frequency of the sound modifies if the bottle changes its shape, volume, etc.   I am interested in understanding how the tone/frequency of this sound can be (approximately) calculated from the shape of the bottle. Is there some formula?  If you have any references about this please post them in your answers.  Being a mathematician I keep hearing that the principal tone is given by the first eigenvalue of the Laplace operator, and I'd like to understand the physical explanation. How do I make a redirect in PHP? Remove paint from the head tube What is the difference between "gerund" and "infinitive"? What is the difference between "gerund" and "infinitive"? I do not understand the differences.Can you explain them? For , the answer given on 7 Feb about how to edit the subject line in the new format of Gmail does not work for me.   There is no box on the left with a down arrow to options to reply, forward or edit subject in my version. There is a book on the right offering options to    Reply Reply to all Forward Filter message Print Delete Report spam Report phising Show original Message text garbled Translate message Mark answered    But, no option to edit subject Add manually installed application to 'Show Applications' grid in Ubuntu 18.04 How to add home directory path to be discovered by Unix which command? Can my child attend a private school whilst I'm on USA ESTA? I am British, currently staying in the USA for 6 weeks on an ESTA Visa Waiver. I am living with a local family and whilst here my child (9 years old) has been attending a private (non-state) school with the children of the local family.  Today somebody told me that by having my child attend a private school I may be in violation of the terms of the ESTA Visa Waiver.  I have found nothing about this at   Where can I find official documentation / online advice about this? How can I install the Google Apps Package (Play Store, ...) on my Android device? I have recently installed a custom ROM and cannot find the Play Store. It seems like all apps that belong to Google are missing.  How can I install the Google Apps Package (Play Store, ...) on my Android device? A word for "intimate friends" without any kind of romance? I'm looking for a word to describe that a particular situation where two people (a man and a woman) are probably the best of friends but have no romantic inclinations towards each other. They may invade each others thoughts periodically but aren't really in a relationship per se. What would be a good word to describe this?  I'm aware of "platonic" but am wondering if there is another word? How can I use a command to delete all files in Downloads whose dates added are greater than 1 year? I am using a Mac. How can I use a command to delete all files in ~/Downloads whose dates added are greater than 1 year? How to pass an argument to event handler in tkinter? Programmatically combining images in PHP How do I run executable scripts in Nautilus?