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Flashback query AS OF
Learn Flashback query AS OF in Oracle SQL through the exact construct, a dedicated example, a boundary case, and a mastery check.
Flashback query AS OF is an atomic Oracle SQL lesson inside DML & Transactions. The example uses the specific syntax, command, API, instruction, or language rule named by this lesson.
Study the construct itself, then change one relevant input and predict the result before running it. That keeps this lesson focused on Flashback query AS OF rather than on generic Oracle SQL syntax.
Topic-specific example
SELECT * FROM users AS OF TIMESTAMP (SYSTIMESTAMP-INTERVAL '5' MINUTE) WHERE id=7;
Test Flashback query AS OF with an empty result, NULL/missing value, duplicate key, or concurrent operation where relevant; database behavior should be verified at the boundary shown by this example.