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Wednesday, April 6, 2011
How to Comapare two Tables Data Difference
Comparing two table is a common task in day to day life of DBA . The Table which has to be compare may on same database or on different database . If the tables are in different database then we can use the database link to compare the two table . Let's have a look on the below tables .
SQL> select * from ( ( select * from dept1 minus // all rows that are in T1 but not in T2 select * from dept2 ) union all ( select * from dept2 minus // all rows that are in T2 but not in T1 select * from dept1 ) )