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In table a 1lakh data is present,in table b 20 thousand data is present, to get unique data from table a and b which join to be considered. whether right outer join or left inner join. 

Question Posted / rashmi

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In table a 1lakh data is present,in table b 20 thousand data is present, to get unique data from tab..

Answer / krish

Using Intersect operator

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In table a 1lakh data is present,in table b 20 thousand data is present, to get unique data from tab..

Answer / oracle enthusiastic

The optimizer automatically decides the driving table based on statistics. The join order is immaterial

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