selecting duplicate data

Hi, Below is my test data and I need to get only those references with duplicate serial nos. So
for my below data, I only need to get the below result. can anyone please give me that tsql code ?

abcd       14157464
abcd       14157454




reference      serialno

abcd       14157456
abcd       14157464
abcd       14157454
xyz      13542546

Thanks
gvamsimbaAsked:
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Leo TorresSQL DeveloperCommented:
try
Select reference,  serialno, Count(1) counts
from table 
Group by reference,  serialno
Having Count(1) > 1

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Saurabh Singh TeotiaCommented:
You can use below mentioned query...

select reference,serialno
from table1
Having count(serialno)>1

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Saurabh...
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gvamsimbaAuthor Commented:
Saurabh your query is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
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gvamsimbaAuthor Commented:
good
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Microsoft SQL Server 2008

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