OCP-1Z0-052-V8 02-15题

最新推荐文章于 2023-04-30 22:58:54 发布

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最新推荐文章于 2023-04-30 22:58:54 发布

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本文链接：https://blog.youkuaiyun.com/qq_43679940/article/details/87088164

本文深入解析了Oracle数据库中Shared SQL Area和Private SQL Area的工作原理。Shared SQL Area位于共享池，为唯一SQL语句提供解析树和执行计划。Private SQL Area则在程序全局区(PGA)中，存储已解析语句及其处理信息，如绑定变量值、查询执行状态等。Private SQL Area的数量受OPEN_CURSORS参数限制。

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15. Which two statements are true about Shared SQL Area and Private SQL Area? (Choose two.)

A.Shared SQL Area will be allocated in the shared pool.

B.Shared SQL Area will be allocated when a session starts.

C.Shared SQL Area will be allocated in the large pool always.

D.Private SQL Area will be allocated in the Program Global Area (PGA) always.

E.Shared SQL Area and Private SQL Area will be allocated in the PGA or large pool.

F.The number of Private SQL Area allocations is dependent on the OPEN_CURSORS parameter.

Answer: AF

答案解析：

shared SQL area:An area in the shared pool that contains the parse tree and execution plan for a SQL statement. Only one shared SQL area exists for a unique statement.

A cursor is a name or handle to a specific private SQL area.cursors are closely associated with private SQL areas。

private SQL area：An area in memory that holds a parsed statement and other information for processing. The private SQL area contains data such as bind variable values,query execution state information, and query execution work areas.

The client process is responsible for managing private SQL areas. The allocation and deallocation of private SQL areas depends largely on the application, although the number of private SQL areas that a client process can allocate is limited by the initialization parameter OPEN_CURSORS.

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