How to join with three tables with multiple conditions? -

-

i want join 3 tables multiple conditions. below table structure , expected result

users_id    users_first_name       1           rocky    2           james    3           john          meeting_details_id   meeting_title   users_id  meeting_lead  close_meeting (no)      1               newmeet          3           1                  no      2               testmeet         2           2                  no    attended_meetings project_meeting_attendeeid  meeting_details_id  users_id   access_type (attendee)    1                             1                 2         attendee

expected output:

query should check if meeting attended or users meeting lead

 meeting_title   creator   meeting_lead     close_meeting (no)   newmeet          john      rocky                  no   testmeet         james     james                  no

try this:

select m.meeting_title,u1.users_first_name creator,u2.users_first_name meeting_lead,m.close_meeting meetingtable m left outer join users u1 on m.creator=u1.users_id left outer join users u2 on m.meeting_lead=u2.users_id

result:

meeting_title   creator     meeting_lead    close_meeting newmeet         john        rocky           no testmeet        james       james           no

see result in sql fiddle.


Comments

Post a Comment

Popular posts from this blog

PHPMotion implementation - URL based videos (Hosted on separate location) -

-
i have implement video collection website users of specific isp. site hosted on public web-server movies hosted on local isp server. user of isp + general visitors can see available movies; isp's users able play them. player on site point url of local machine ( http://192.x.x.x/movies/mymovie.mov ) private class (192.x.x.x) accessible isp user. question: possible phpmotion script? or need custom work. if possible, can please suggest available mods? phpmotion require modifications able handle this. uploading, conversion, thumbnail generation, , playback pretty static in phpmotion. really though, rather modding entire upload , conversion process, if created quick custom form add entries phpmotion database (maybe include thumbnail upload), tweaked playback paths, should go on phpmotion side of things. assume had videos in format player handle (such flv or mp4).
Read more

javascript - Using Windows Media Player as video fallback for video tag -

-
getting video play cross platform using example video.js bit of fuss. in days when video should embedded use embed windows media player, work out of box on windows. since it's today old ie on windows doesn't support video tag experimented using windows media player fallback, , work well. what wonder here is, why haven't else solution? have missed something? code small, there's no flash files, cross domain issues or need of server working. works. so before develop further , add custom control , subtitles support wonder say. the code looks this: <video id="myvideo" style="width:640px; height: 360px;" autoplay data-wimpsource="http://esd.volvocars.com/dc/cdn/video/birds-on-a-wire.mp4"> <source src="http://esd.volvocars.com/dc/cdn/video/birds-on-a-wire.mp4" type="video/mp4" /> <source src="http://esd.volvocars.com/dc/cdn/video/birds-on-a-wire.webm" type="video/webm" />
Read more

c# - Unity IoC Lifetime per HttpRequest for UserStore -

-
i'm trying clean default implementation of accountcontroller.cs comes out of box in new mvc5/owin security implementation. have modified constructor this: private usermanager<applicationuser> usermanager; public accountcontroller(usermanager<applicationuser> usermanager) { this.usermanager = usermanager; } also, have created lifetime manager unity looks this: public class httpcontextlifetimemanager<t> : lifetimemanager, idisposable { private httpcontextbase _context = null; public httpcontextlifetimemanager() { _context = new httpcontextwrapper(httpcontext.current); } public httpcontextlifetimemanager(httpcontextbase context) { if (context == null) throw new argumentnullexception("context"); _context = context; } public void dispose() { this.removevalue(); } public override object get
Read more