Using alias in mysql is not working -

-

i confused usage of alias. example, query below works fine

select *  ( select row_number() on (partition prodid order quantity desc) 'rankin',prodid,quantity sales ) rankin=1

but when modify shown in snippet below error: "invalid column name 'rownumber'". 

select row_number() on (order quantity) 'rownumber' sales rownumber = 1

please explain difference.

this because select executed after where , from executed before where cannot used in second query can used in first query.


Comments

Post a Comment

Popular posts from this blog

ios - UICollectionView Self Sizing Cells with Auto Layout -

-
Image
i'm trying self sizing uicollectionviewcells working auto layout, can't seem cells size content. i'm having trouble understanding how cell's size updated contents of what's inside cell's contentview. here's setup i've tried: custom uicollectionviewcell uitextview in contentview. scrolling uitextview disabled. the contentview's horizontal constraint is: "h:|[_textview(320)]", i.e. uitextview pinned left of cell explicit width of 320. the contentview's vertical constraint is: "v:|-0-[_textview]", i.e. uitextview pinned top of cell. the uitextview has height constraint set constant uitextview reports fit text. here's looks cell background set red, , uitextview background set blue: i put project i've been playing on github here . updated ios 9 after seeing github solution break under ios 9 got time investigate issue fully. have updated repo include several examples of different configurations s...
Read more

DOM Manipulation in Wordpress (and elsewhere) using php -

-
DOM Manipulation in Wordpress (and elsewhere) using php - i'm quite new dom manipulation world , head start in order avoid mutual errors. i looking efficient way manipulate content generated wordpress using php. @ moment using simple html dom seems work fine. found domdocument , few others , helpfull if cleared out 1 faster, improve or @ to the lowest degree generate less errors in case of bad markup. also on side can explain syntax (instead of $html @$html) thank much php wordpress domdocument simple-html-dom
Read more

asp.net - Passing parameter to telerik popup -

-
is there way pass parameter telerik similar window.showmodaldialog the way call window.showmodaldialog : window.showmodaldialog(pagename, myargs, 'status:no;dialoghide=true;help:no') myargs parameter passing popup try likes , <script type="text/javascript"> function openradwin(myargs) { radopen("yourpagename.aspx?parameter=" + myargs , "radwindow1"); } </script> <telerik:radwindowmanager id="radwindowmanager1" runat="server" enableshadow="true" visiblestatusbar="false"> <windows> <telerik:radwindow id="radwindow1" runat="server" showcontentduringload="false" width="400px" height="400px" title="telerik radwindow" behaviors="default"> </telerik:radwindow> </windows> </telerik:radwindowmanager> and , @ page_load of...
Read more