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Which three are true about multiple INSERT statements?
Correct Answer: B,C,D
Multiple INSERT statements allow data insertion into one or more tables based on different conditions or datasets: * Option A: False. Multiple INSERT operations can be performed using direct values, subqueries, or even default values, not exclusively through subqueries. * Option B: True. They can indeed be performed on relational tables, which is the standard use case in most relational databases. * Option C: True. INSERT operations can be performed on updatable views, assuming the view is not complex (involving joins, GROUP BY clauses, etc.). * Option D: True. Oracle allows INSERT operations on remote tables via database links, enabling distributed database interactions. * Option E: False. Direct INSERT statements cannot be performed on external tables. External tables are typically used for read operations, with data loading handled through utilities like SQL*Loader or external data processing tools. * Option F: False. Each INSERT statement inserts data into one table. While a single SQL command block can contain multiple INSERT statements, each one is directed at a single table.