How to solve Oracle Database Error 1731 (ora-01731)

Oracle Error Code
   ora-01731

Description
   circular view definition encountered

Cause
   Through a series of CREATE and DROP VIEW statements, a view was defined that refers to itself. For example, VIEW1 might include a column from VIEW2 that is defined as a column in VIEW1. View definitions may be seen by querying the data dictionary.
How to Solve
   Check the view definitions, remove any circular references, and retry the statements.

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Similar Errors
  ORA-01631    ORA-01632    ORA-01633    ORA-01731    ORA-01732    ORA-01733    ORA-01734  Others

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