Oracle 11G OCP 1Z0-053 239

（239）Evaluate the following command:

SQL>ALTER SYSTEM SET db_securefile = 'IGNORE';

What is the impact of this setting on the usage of SecureFiles?

A. It forces BasicFiles to be created even if the SECUREFILE option is specified to create the LOB.

B. It forces SecureFiles to be created even if the BASICFILE option is specified to create the LOB.

C. It does not allow the creation of SecureFiles and generates an error if the SECUREFILE option is specified to create the LOB.

D. It ignores the SECUREFILE option only if a Manual Segment Space Management tablespace is used and creates a BasicFile.

答案：（A）

解析：

DB_SECUREFILE = {NEVER | PERMITTED | ALWAYS | IGNORE}

1. NEVER

指定為SecureFiles的LOB都被建立為BasicFile LOBs.

所有SecureFile LOB特定的儲存選項和功能(例如, compress,encrypt,deduplicate)都會引起異常.

BasicFile LOB的預設值將被用於沒有指定的儲存選項

2. PERMITTED

LOBs允許被建立為SecureFiles

3. ALWAYS

試圖建立所有的LOBs為SecureFile LOBs,但不是自動段空間管理的表空間中的LOBs將被建立為,除非SECUREFILE被顯示指定.

任何指定的BasicFile LOB儲存選項將被忽略,並且SecureFile LOB的預設值將用於沒有指定的儲存選項

4. IGNORE

SECUREFILE關鍵字和所有的SECUREFILE選項被忽略

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