Basic Oracle Concepts and Programming Question:
What Are the Restrictions on External Table Columns?
Answer:
When creating external table columns, you need to watch out some restrictions:
► "PRIMARY KEY" is not allowed.
► "NOT NULL" is not allowed.
► "DEFAULT value" is not allowed.
► "PRIMARY KEY" is not allowed.
► "NOT NULL" is not allowed.
► "DEFAULT value" is not allowed.
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