Oracle Logbook

June 2, 2008

How to find duplicate record in Oracle

Filed under: Uncategorized — Helio Dias @ 1:23 pm

It´s easy, you just query twice your table when rowid are lower and all columns are the same. e.g.

select t1.rowid from table1 tb1,table1 tb2
where t1.rowid<t2.rowid
and
t1.col1=t2.col1 and
t1.col2=t2.col2 and
t1.col3=t2.col2 and
t1.col4=t2.col2 and
t1.col5=t2.col2 and …….

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