Which three actions can you perform on an existing table containing date? A. Add a new column as the table's first column. B. Define a default value that is automatically inserted into a column contai ...
Which three actions can you perform on an existing table containing date? A. Add a new column as the table's first column. B. Define a default value that is automatically inserted into a column contai ...
Which statement is true about TRUNCATE and DELETE? A. For large tables TRUNCATE is faster than DELETE. B. For tables with multiple indexes and triggers is faster than TRUNCATE. C. You can never TRUNCA ...
Choose thebest answer.Examine the description of the EMPLOYEES table: Name Null Type---------------------------------------------------------- EMP_ID NOT NUL NUMBEREMP_NAME ...
如何在Oracle一个分区（指定）上创建索引
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