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1. what is the exact use of hint in sql.

2. How we can avoid index scan in sql even though index is 
there in the table.
 Question Submitted By :: SQL-PLSQL
I also faced this Question!!     Answer Posted By  
# 1
1. Hints instructs the optimizer to generate the explain
plan as hinted rather than the optimizer choosing its own
explain plan..

2. There are many ways like disabling the index usage by
implementing a function or an operation on the indexed
column OR giving a FULL hint in the query for that
particular table etc
Is This Answer Correct ?    6 Yes 0 No
Karkuvelrajan Muthusamy

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