Basic Oracle Concepts and Programming Question:
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What Are the General Rules on Data Consistency?
Answer:
► All SQL statements always work with a snapshot of the database to provide data consistency.
► For READ WRITE transactions, the snapshot is taken when each statement starts.
► For READ ONLY transactions, the snapshot is taken when the transaction starts.
► The snapshot never include uncommitted changes from other transactions.
► The snapshot always include uncommitted changes from its own transaction.
► For READ WRITE transactions, the snapshot is taken when each statement starts.
► For READ ONLY transactions, the snapshot is taken when the transaction starts.
► The snapshot never include uncommitted changes from other transactions.
► The snapshot always include uncommitted changes from its own transaction.
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