Read consistency, as supported by ORACLE, does the FOLLOWING:

•Guarantees that the set of data seen by a statement is consistent with respect to a single point in time and does not change during statement execution (statement-level read consistency)
•Ensures that READERS of database data do not wait for writers or other readers of the same data
•Ensures that writers of database data do not wait for readers of the same data Ensures that writers only wait for other writers if they attempt to update identical rows in concurrent TRANSACTIONS

Read consistency, as supported by Oracle, does the following:

•Guarantees that the set of data seen by a statement is consistent with respect to a single point in time and does not change during statement execution (statement-level read consistency)
•Ensures that readers of database data do not wait for writers or other readers of the same data
•Ensures that writers of database data do not wait for readers of the same data Ensures that writers only wait for other writers if they attempt to update identical rows in concurrent transactions