Explain spool.
What is a sql statement?
What is a database trigger ? Name some usages of database trigger ?
..........refers to the disk mirroring
Does truncate release storage space?
What is a CTE (Common Table Expression), and how is it different from a subquery?
What are the different types of sql commands?
Is left join inner or outer by default?
Explain the savepoint statement.
How to get the procedure's, function's name from a package if it is wrapped(both spec & body).
What is the fastest way of accessing a row in a table?
Is sql a backend?
What is pl sql variable?