sql - Why is "AS emp" needed in this query - 


select top 1 salary (        select top 3 salary         employees         order salary desc) emp   order salary asc

why "as emp" used in query? query not work without using as.

the reason because need alias subquery. think of subquery creating table select , query trying reference it. might not going on, helps me justify why have add alias @ end.


Comments

Post a Comment

Popular posts from this blog

php - XML feed for Wordpress Social Board plugin modifications -

at work, i've been tasked modifying wordpress social board plugin duplicating rss feed functionality display xml feed specific our calendaring system. for example, our xml feed outputs: <?xml version="1.0"?> <events> <event> <eventid>1449080815796</eventid> <sponsorid>14</sponsorid> <inputsponsor>administration</inputsponsor> <displayedsponsor>lesbian, gay, bisexual, , transgender (lgbt) resource center, division of student affairs</displayedsponsor> <displayedsponsorurl></displayedsponsorurl> <date>2016-01-25</date> <timebegin>18:00</timebegin> <timeend>20:00</timeend> <repeat_vcaldef></repeat_vcaldef> <repeat_startdate></repeat_startdate> <repeat_enddate></repeat_enddate> <categoryid>119</categoryid> <category>diversity</category> <title>new 2 &apos;quse discussion group</title...
Read more

php - Wordpress website dashboard page or post editor content is not showing but front end data is showing properly -

Image
recently have uploaded wordpress site onto server. have uploaded wordpress site in sub-folder under root folder ../root(domain root folder)/wordpress (where host wordpress folder). now problem content data in page or post in dashboard of wordpress admin panel not showing - see image. but data showing in front view - see image. if not browser cache issue , not issue happened tinymce editor during upgrade; try add config file: define('concatenate_scripts', false);
Read more

javascript - Twitter Bootstrap - how to add some more margin between tooltip popup and element -

Image
i have not tryed since can't understand space between tooltip , element made/added bootstrap, tooltip near element triggers tooltip event. i make tooltip opening little bit away element, add more margin tooltip , eleemnt mean. i understand how in css if possible , if possible make both right,left,top,bottom tooltips hope question clear. this how tooltips looks on app: and , how should looks after this default css tooltip on top : .tooltip.top { padding: 5px 0; margin-top: -3px; } you can override in own css : .tooltip.top { margin-top: -10px; } note code work work tooltip on top, you'll nedd adapt css 3 other orientations : .tooltip.top { margin-top: -10px; } .tooltip.right { margin-left: 10px; } .tooltip.bottom { margin-top: 10px; } .tooltip.left { margin-left: -10px; }
Read more