Using DISTINCT doesn't make effect

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1.00/5 (1 vote)

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See my previous question at:
How to select distinct data from DataBase with LINQ To SQL and have a good performance ?[^]

Hi all,

I need to remove frequent records from the result:

All result:
name department school
A---- D ---- S
A ---- C---- S
A---- D ---- S
B ---- D---- S

the result should be after using DISTINCT:

name department school
A---- D---- S
B---- D---- S
A---- C---- S

Posted 6-May-11 22:25pm

IT-discovery

Updated 7-May-11 1:02am

NuttingCDEF

v4

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Dalek Dave 7-May-11 4:29am

Edited for Grammar and Readability.

Keith Barrow 7-May-11 4:36am

Please paste your Code into your question.

yesotaso 7-May-11 4:42am

Same Question: http://www.codeproject.com/Questions/192615/How-to-select-distinct-data-from-DataBase-with-LIN.aspx
Same inqusitor, same answer, 30 mins time frame...

NuttingCDEF 7-May-11 6:59am

Agreed - why do people think that if they ask a question and don't like or don't understand the answer that they'll get a different answer by asking the same question again?

Without any code / more information from the questioner, this feels like it's just a guessing game.

3 solutions

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**Dalek Dave** · Answer 1 · 2011-05-06T22:32:00

Solution 1

This may help[^]

Posted 6-May-11 22:32pm

Dalek Dave

Michael Waguih · Answer 2 · 2011-05-06T22:37:00

Hi it-discovery,

This is the query you need :

var Query = (from query in dataClass.Student
             select new
             {
                 name = query.name,
                 department = query.department,
                 school = query.school
             }).Distinct();

This Query will select the output you need.

I hope this help,
Thank you,
:)

IT-discovery · Answer 3 · 2011-05-06T23:02:00

Solution 3

thanks Michael Waguih,
but the query still doesn't work :(
any more idea?

Posted 6-May-11 23:02pm