Explain database link?
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what is candidate key & super key
What is difference between SUBSTR and INSTR?
Can the query output be sorted by multiple columns in oracle?
can anyone help me ? an index has been done on the primary key of a table. an update operation was performed on that table. now my question is 1> what abt the performance ? means faster or slower due to indexing ? 2> does the operation affect to the primary key constraint ?
how to insert data into partitioned table partition done by Range partition
How to convert numbers to characters in oracle?
can u send the sql dumps to sivakumarr1987@gmail.com plz help me
How to name query output columns in oracle?
How to create a testing table in oracle?
what is the bitmap index?
What is the difference between postgresql and oracle?
List out the types of joins.
Oracle General 
