Data Consistency In Oracle Database, each user must see a consistent view of the data, including visible changes made by a user’s own transactions and committed transactions of other users. For example, the database must prevent the dirty read problem, which occurs when one transaction sees uncommitted changes made by another concurrent transaction. Oracle Database … Read more
Structured Query Language (SQL) is the set of statements with which all programs and usersaccess data in an Oracle Database. Application programs and Oracle tools often allow usersaccess to the database without using SQL directly, but these applications in turn must useSQL when executing the user’s request. SQL is a set-based declarative language that provides … Read more
In Oracle Database, a database schema is a collection of logical data structures, or schema objects. A database user owns a database schema, which has the same name as the user name. Schema objects are user-created structures that directly refer to the data in the database. The database supports many types of schema objects, the … Read more