Oracle – the dual table in Oracle

dual-tableoracle

I've heard people referring to this table and was not sure what it was about.

Best Answer

It's a sort of dummy table with a single record used for selecting when you're not actually interested in the data, but instead want the results of some system function in a select statement:

e.g. select sysdate from dual;

See http://www.adp-gmbh.ch/ora/misc/dual.html