Comments on: Write query to get custom results http://interview.msdotnetheaven.com/database-question-answer/write-query-to-get-custom-results.html Best place for interview preparation Mon, 08 Feb 2010 11:07:03 +0000 hourly 1 http://wordpress.org/?v=3.0 By: gaurav.arora http://interview.msdotnetheaven.com/database-question-answer/write-query-to-get-custom-results.html/comment-page-1#comment-6 gaurav.arora Mon, 08 Feb 2010 11:07:03 +0000 http://interview.msdotnetheaven.com/?p=659#comment-6 Great one! I have requirement where I need to update an existing table, here is the query : <code> declare @tbl table(id int identity, university varchar(100),Utotals int, status varchar(100),statuscnt int) insert into @tbl(university,Utotals,status,statuscnt) select 'u1',100,'pending',20 union all select 'u1',100,'Active',20 union all select 'u1',100,'Deferred',60 union all select 'u2',60,'pending',20 union all select 'u2',60,'Activ',20 union all select 'u2',60,'Deferred',20 select * from @tbl update tt set university=null, utotals=null from @tbl tt inner join @tbl t2 on tt.id = t2.id + 1 and tt.university = t2.university select * from @tbl </code><div class="comment-remix-meta"><a href="#" class="replyto" onclick="replyto('6','gaurav.arora'); return false;">Reply</a> - <a href="#" class="quote" onclick="quote('6','gaurav.arora','Great one!\r\n\r\nI have requirement where I need to update an existing table, here is the query :\r\n\r\n<code>\r\ndeclare @tbl table(id int identity, university varchar(100),Utotals int, status varchar(100),statuscnt int)\r\ninsert into @tbl(university,Utotals,status,statuscnt)\r\nselect \'u1\',100,\'pending\',20\r\nunion all\r\nselect \'u1\',100,\'Active\',20\r\nunion all\r\nselect \'u1\',100,\'Deferred\',60\r\nunion all\r\nselect \'u2\',60,\'pending\',20\r\nunion all\r\nselect \'u2\',60,\'Activ\',20\r\nunion all\r\nselect \'u2\',60,\'Deferred\',20\r\n\r\nselect * from @tbl\r\n\r\nupdate tt\r\nset university=null,\r\n utotals=null\r\nfrom @tbl tt inner join @tbl t2 on tt.id = t2.id + 1\r\nand tt.university = t2.university\r\n\r\nselect * from @tbl\r\n<\/code>'); return false;">Quote</a></div> Great one!

I have requirement where I need to update an existing table, here is the query :


declare @tbl table(id int identity, university varchar(100),Utotals int, status varchar(100),statuscnt int)
insert into @tbl(university,Utotals,status,statuscnt)
select 'u1',100,'pending',20
union all
select 'u1',100,'Active',20
union all
select 'u1',100,'Deferred',60
union all
select 'u2',60,'pending',20
union all
select 'u2',60,'Activ',20
union all
select 'u2',60,'Deferred',20

select * from @tbl

update tt
set university=null,
utotals=null
from @tbl tt inner join @tbl t2 on tt.id = t2.id + 1
and tt.university = t2.university

select * from @tbl

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