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但包级别例外，使用动态 SQL 时，您可能会有多个连接（位于不同的应用程序之中），为每个连接定义多个不同的隔离级别。
With the exception of the package level, for dynamic SQL you can have multiple connections (in different applications) and define different isolation levels for each connection.
惟一的例外是，具有较少写活动和不可预测的查询工作负载的应用程序，这种应用程序难于定义更明确的索引。
The only exception could be applications with low write activity and unpredictable query workload such that more specific indexes are hard to define.
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