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Can you help me write these SQL queries, using Oracle database and SQL Developer ? 12. List all distinct prerequisites for the classes. (17 rows)

Can you help me write these SQL queries, using Oracle database and SQL Developer ?

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12. List all distinct prerequisites for the classes. (17 rows) The following questions use the dual table **** 13. Explain what the dual table is used for. Ensure your answer is in comments. 14. Display all columns and rows of the Dual table. xDUTMY

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