What do you mean by group by clause?
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State the difference between a primary key and foreign key?
How to check your oracle database 10g xe installation?
How to use "in out" parameter properly?
what is analyze command ? what kind of statistics does it generate?
Why oracle is used?
What spfile/init.ora file parameter exists to force the CBO to make the execution path of a given statement use an index, even if the index scan may appear to be calculated as more costly?
How to delete a column in an existing table in oracle?
What is a nested table and how is it different from a normal table?
How are extents allocated to a segment?
How to select some rows from a table in oracle?
what's query optimization and without use of IN AND Exist can we get another way data from query
In the oracle version 9.3.0.5.0, what does each number shows?