SQL - fetch records based on a condition of two columns -

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i need fetch records order no = abc has more 1 tracking number in large table can that?

i'll assume you're fetching records orders , "large table" trackingnumbers. can group by orderno in sub-query , refine sub-query using having clause. sub-query return ordernos in table more once. example:

select orderno   orders  orderno in (select orderno                      trackingnumbers                     group orderno                    having count(*) > 1)

to identify duplicates in single table (as mentioned in comments):

select *   orders  group trackingnumber having count(*) > 1

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