Definition of irrigation. 1  1 : the therapeutic flushing of a body part with a stream of liquid. 2  2 : the watering of land by artificial means to foster plant growth.
Answer: To start with, Oracle Real Application Clusters (RAC) are a database system involving a configuration of multiple hosts or servers joined together with clustering software and accessing the shared disk storage structures.
The Oracle DUAL table. dual is a table which is created by oracle along with the data dictionary. It consists of exactly one column whose name is dummy and one record.The value of that record is X. The owner of dual is SYS but dual can be accessed by every user.he Oracle DUAL table. dual is a table which is created by oracle along with the data dictionary. It consists of exactly one column whose name is dummy and one record.