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Question: If you need to have your archive log files named with the log sequence numbers as arch_0000001, arch_0000002, and so on (zero filled, fixed width), what should be the value of the LOG_ARCHIVE_FORMAT parameter?
Answer: The LOG_ARCHIVE_FORMAT parameter should be arch_%S. Of the four formatting variables available, %S specifies the log sequence number, leading zero filled. %s specifies the log sequence number; %t specifies the thread; and %T specifies the thread, leading zero filled.
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Question:
If you need to have your archive log files named with the log sequence numbers as arch_0000001, arch_0000002, and so on (zero filled, fixed width), what should be the value of the LOG_ARCHIVE_FORMAT parameter?
Answer:
The LOG_ARCHIVE_FORMAT parameter should be arch_%S. Of the four formatting variables available, %S specifies the log sequence number, leading zero filled. %s specifies the log sequence number; %t specifies the thread; and %T specifies the thread, leading zero filled. Source: CoolInterview.com
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