mysql - Php sql DISTINCT row id without duplicate -

- 

select distinct buyer,caseid,subject,service s_support   order id desc

result is

buyer               subject          service    caseid abel@gmail.com ---- need ---- other ---- 438613 bani@gmail.com ---- urgent      ---- other ---- 438612 rony@gmail.com ----        ---- other ---- 438611

i want view id in distinct how? wants hide duplicates keep 1 row per buyer/subject/service/case keep row id.

id  buyer               subject          service    caseid 9   abel@gmail.com ---- need ---- other ---- 438613 7   bani@gmail.com ---- urgent      ---- other ---- 438612 6   rony@gmail.com ----        ---- other ---- 438611

the question unclear looking this.

try both of in mysql_query() , keep 1 fits need (if any)

eliminate duplicates , keep lowest id 

     select min(id) id, buyer,caseid,subject,service       s_support       group buyer,caseid,subject,service      order id desc

eliminate duplicates , keep highest id 

     select max(id) id, buyer,caseid,subject,service       s_support       group buyer,caseid,subject,service      order id desc

if not, rewrite question in intelligible manner :)


Comments

Post a Comment

Popular posts from this blog

mysql - Dreamhost PyCharm Django Python 3 Launching a Site -

-
i'm new python/django , created simple django website using pycharm. site works fine running on computer, i'm lost when comes taking site onto host (dreamhost). i'm able upload files correct directories fine, , believe made correct changes database on mysql. i'm not sure go there though. right now, page shows files rather site. direction appreciated. much! you should not run django application using python manage.py runserver on production. how run application on django depends on server (apache, nginx) want use for apache - https://docs.djangoproject.com/en/1.10/howto/deployment/wsgi/modwsgi/ for nginx - https://www.digitalocean.com/community/tutorials/how-to-serve-django-applications-with-uwsgi-and-nginx-on-ubuntu-14-04 the mysql database should, of course, exist , have correct credentials. or, if choose use sqlite, file should accessible, readable , writable www-user (may different depending on linux distributive)
Read more

java - Sending SMS with SMSLib and Web Services -

-
i have made rest web service send smss using hsdpa usb modem. using smslib in java send smss. every time web service invoked, create gateway start service, send message, stop service , remove gateway. takes 20 seconds each message. found starting service takes lot of time. part of code use send smss service.getinstance().addgateway(gateway); service.getinstance().startservice(); outboundmessage msg = new outboundmessage(phonenumber, message); if (service.getinstance().sendmessage(msg)) { result = "message sent successfully!!"; } else { result = "could not send message."; } service.getinstance().stopservice(); service.getinstance().removegateway(gateway);//remove gateway is there way can start service once if not started , use send message when ever web service invoked? why dont group messages , send in 1 go? service.getinstance().sendmessages(messa...
Read more

java - How to resolve The method toString() in the type Object is not applicable for the arguments (InputStream) -

-
i'm trying read json file local machine. @path("/") public class jsonparsing { file f = new file("file.json"); if (f.exists()){ inputstream = new fileinputstream("file.json"); string jsontxt = ioutils.tostring(is); system.out.println(jsontxt); jsonobject json = new jsonobject(jsontxt); string = json.getstring("1000"); system.out.println(a); } } but i'm getting error in tostring() method. possible read .txt file containing json object local machine? if possible, how done? firstly: whenever ask question- add imports well. secondly: yes possible read .txt file containing json object. steps: 1. add maven dependency in pom.xml - <dependency> <groupid>com.googlecode.json-simple</groupid> <artifactid>json-simple</artifactid> <version>1.1.1</version> </dependency> or add jar of dependency. 2.import...
Read more