What do you mean by query optimization?
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What are the types of keys?
select 10 from dual; y its showing all the rows with 10?
What is clustered and nonclustered index in sql?
What is a constraint? Tell me about its various levels.
What is restrict in sql?
Is left join faster than join?
what is definer rights invoke rights?
Main diff between varray and nested tablea
What does pragma mean?
what is the difference between truncate and drop statements? : Sql dba
What is clustered, non-clustured and unique index. How many indexes can be created on a table ?
how many columns can be used for creating index? : Sql dba
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