单选题
发布日期:2021-03-17
VitB6加速L-dopa从肾脏排出
VitB6加速L-dopa的外周代谢
VitB6化学上与L-dopa拮抗
VitB6生理上与L-dopa拮抗
VitB6减少L-dopa中枢脱羧
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You upgraded from a previous Oracle database version to Oracle Database version to Oracle Database12c. Your database supports a mixed workload. During the day, lots of insert, update, and deleteoperations are performed. At night, Extract, Transform, Load (ETL) and batch reporting jobs are run. The ETL jobs perform certain database operations using two or more concurrent sessions.After the upgrade, you notice that the performance of ETL jobs has degraded. To ascertain the cause ofperformance degradation, you want to collect basic statistics such as the level of parallelism, totaldatabase time, and the number of I/O requests for the ETL jobs. How do you accomplish this?()
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储存合理化的方法
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