Linq to SQL distinct join and group -

-

i've been struggling linq query... have following 2 tables: 1) emailrunheaders - columns: id, emailrunid, emailid 2) emailtrackers - columns: id, emailid

every day batch of emails sent. unique "emailrunid" assigned batch/group of emails , each email assigned "emailid". info stored in "emailheaders" table. so, each emailid in table unique, emailrunid appear more once..since there more 1 email in each "batch" or run.

when email opened, using http handler, open logged in emailtracker table...where particular emailid stored. since email opened more once, possible emailid appear more once in table.

i need total number of emails opened, without double counting emails opened more once, every email run.

this have far. nested query works fine..returning total number of emails opened each run, if there @ least 1 opened each run. tried wrapping in join return distinct emailrunids header table..but stuck..i don't know how emailrunid "ah1".

from arh1 in emailrunheaders.select(x => x.emailrunid).distinct() join eo in  (from et in emailtrackers join arh2 in emailrunheaders on et.emailid equals arh2.emailid.tostring() j1 j2 in j1.defaultifempty() group j2 j2.emailrunid g select new {runid = g.key, count = g.count()}) on arh1 equals eo.runid tg tg2 in tg.defaultifempty() select tg2


Comments

Post a Comment

Popular posts from this blog

javascript - How to get current YouTube IDs via iMacros? -

-
i want viewed youtube video id , save csv via imacros, gets nothing. here js code: var videoid; videoid ="code:"; videoid +="url goto=https://www.youtube.com/watch?v=dbnywxdz_pa"+"\n"; videoid +="add !extract {{!urlcurrent}}"+"\n"; videoid +="set !var1 eval(\"var s=\"{{!urlcurrent}}\"; s.match((?<=watch\\?v=|/videos/|embed\\/)[^#\\&\\?]*);s[0]; \")"+"\n"; videoid +="add !extract {{!var1}}"+"\n"; videoid +="saveas type=extract folder=* file=url.csv"+"\n"; try this: var videoid = "url goto=https://www.youtube.com/watch?v=dbnywxdz_pa" + "\n"; videoid += "set !extract {{!urlcurrent}}" + "\n"; videoid += 'set !extract eval("\'{{!extract}}\'.match(/v=(.{11})/)[1];")' + "\n"; videoid += "saveas type=extract folder=* file=url.csv" + "\n"; iimplay
Read more

c# - Maintaining a program folder in program files out of date? -

-
for program i'm writing in vs c# wpf need store user related information on user's computer. far knew has been done creating folder in c:\program files , adding whatever program related info folder in subfolders or whatever. after doing browsing came across lot of people saying method out of date because access may denied create folder there, works administrative accounts, etc.. 1 site suggested saving c:\users\username\appdata\roaming or c:\users\username\appdata\local. question best , date method saving program data users computer? also take @ msdn article . it uwp apps have general idea put if developing wpf app. you may need these folders: environment.specialfolder.applicationdata environment.specialfolder.localapplicationdata environment.specialfolder.commonapplicationdata
Read more

emulation - Android map show my location didn't work -

-
i have been struggle current location in google map, tried official map demo, not working also. shows getmylocation button on upper right, didn't show blue dot on map current location. here code , i'm using emulator target api 23, guess may emulator's problem since code download directly github. advice appreciated. [screenshot][1] package com.example.mapdemo; import com.google.android.gms.maps.googlemap; import com.google.android.gms.maps.googlemap.onmylocationbuttonclicklistener; import com.google.android.gms.maps.onmapreadycallback; import com.google.android.gms.maps.supportmapfragment; import android.manifest; import android.content.pm.packagemanager; import android.os.bundle; import android.support.annotation.nonnull; import android.support.v4.app.activitycompat; import android.support.v4.content.contextcompat; import android.support.v7.app.appcompatactivity; import android.widget.toast; /** * demo
Read more