sql server - Get Parent and grand parents of a particular child -


i have table below

tablename :exampletable 

childid       childcommonid   parentid   1               2                0  2               3                0  3               4                1  4               5                3  5               6                4

the problem :

i have child id example :childid= 5

so need check wheather has parent or not if contain parent check corresponsing parentid, in case parentid 4 need check child 4 has parent ,in case parentid of child 4 3, gain check child 3 has parent in case child 3 has parent 1, check child 1 has parents here child 1 top grand parent , has no parent stop process , return childids 1

here expected output 

childid  5 4 3 1

i had tried below not give correct output

with getallparent (    select *     exampletable     childid  = 5    union    select *    exampletable c       left join getallparent p on p.childid = c.parentid  )  select * getallparent;

if need sample data can use below query 

create table exampletable(childid int,childcommonid int ,parentid int ) insert exampletable values(1,2,0) insert exampletable values(2,3,0) insert exampletable values(3,4,1) insert exampletable values(4,5,3) insert exampletable values(5,6,4)

any appreciated

like comment, columns incorrect in join. use getallparent p on p.parentid = c.childid.

with getallparent (    select childid,parentid    exampletable     childid  = 5    union    select c.childid,c.parentid    exampletable c       inner join getallparent p on p.parentid = c.childid  )  select * getallparent;

fiddle


Comments

Post a Comment

Popular posts from this blog

javascript - Google App Script ContentService downloadAsFile not working -

i have web app developed using google app script htmlservice , html form, populating excel sheet in google drive using spreadsheetapp . , 1 section calling contentservice download data excel file. function doget(e) { // read excel sheet //getappfile(); // render application html template return htmlservice.createtemplatefromfile('index').evaluate() .settitle('go smart') .setsandboxmode(htmlservice.sandboxmode.iframe); } function downloaddoublequatecsvfile() { var sheetid = propertiesservice.getscriptproperties().getproperty('sheetid'); var ss = spreadsheetapp.openbyid(sheetid).getactivesheet(); //var ss = spreadsheetapp.getactivespreadsheet().getactivesheet(); var maxcolumn = ss.getlastcolumn(); var maxrow = ss.getlastrow(); var data = ss.getrange(1, 1, maxrow, maxcolumn).getvalues(); if (data.length > 1) { var csv = ""; (var row = 0; row < data.length; row++) { (var c...
Read more

javascript - Function overwritting -

is there way overwrite function or event handling in function? using addeventlistener, can have many event handlers on element want var test=document.getelementbyid("div"); test.addeventlistener("click",function(){alert("im first");},false); test.addeventlistener("click",function(){alert("im second");},false); // alerts "im first" , after "im second" but if want overwrite function/event example based on client width example this function one() { alert("first"); } function two() { alert("second"); } window.onresize = function() { var test = document.getelementbyid("div"); if (window.innerwidth > 500) { test.onclick = 1 } else { test.onclick = two; } } is possible in javascript? in case use effective little known approach. addeventlistener can accept object property handleevent event handler. in case it's easy overwr...
Read more

c# - Exception when attempting to modify Dictionary -

i creating dictionary manage threads , ran exception when attempt clear dead threads after adding threads dictionary. using system; using system.collections.generic; using system.threading; namespace syscat { public class threadmanager { public static readonly threadmanager globalthreadmanager = new threadmanager( ); /// <summary> /// initializes new instance of <see cref="syscat.threadmanager"/> class. /// </summary> public threadmanager( ) { } /// <summary> /// create new threadmanager threads within basetm , deinitializes basetm /// </summary> public threadmanager( threadmanager basetm ) { this.threads = basetm.threads; basetm.threads.clear( ); } private dictionary<guid,thread> threads = new dictionary<guid, thread>( ); /// <summary> /// attempts obtain unused threadid within ...
Read more