What is 'cross join'? Or what is cartesian product?
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what is the difference between inline query and corelated subquery
What is a relation in dbms?
Why do we need database management?
can Constraints cannot be exported through EXPORT command ?
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Is it possible to modify a Datatype of a column when column contains values?
What are the main components of a database system?
What is data sparsity and how it effect on aggregation?
1)what is the difference between view and materilized view? 2)what is the difference between delete and truncate? 3)what is the difference between migration and upgration? 4)what is the difference between RMAN HOT BACKUP and normal hot backup?
What is the easiest database to learn?
What are the different stages in 'data warehousing'?
What are the functions of rdbms?
Why are recursive relationships are bad? How do you resolve them?