网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
什么是ETL？
参考答案
更多 “什么是ETL？” 相关考题
考题
What is a logical data mapping and what does it mean to the ETL team?什么是逻辑数据映射？它对ETL项目组的作用是什么？
考题
When should data be set to disk for safekeeping during the ETL?简述ETL过程中哪个步骤应该出于安全的考虑将数据写到磁盘上？
考题
What are the essential deliverables of the data quality portion of ETL?ETL项目中的数据质量部分核心的交付物有那些？
考题
Name the three fundamental fact grains and describe an ETL approach for each.简述三种基本事实表，并说明ETL的过程中如何处理它们。
考题
What steps do you take to determine the bottleneck of a slow running ETL process?如果ETL进程运行较慢，需要分哪几步去找到ETL系统的瓶颈问题。
考题
修改dmetl.ini控制文件的哪个参数可控制ETL引擎是否随机启动（）A、METADATA_TYPEB、ENGINE_WORKER_COUNTC、START_ETL_ENGINED、SERVICE_TYPE
考题
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?（）A、Examine the Active Session History (ASH) reports for the time period of the ETL or batch reporting runs.B、Enable SQL tracing for the queries in the ETL and batch reporting queries and gather diagnostic data from the trace file.C、Enable real-time SQL monitoring for ETL jobs and gather diagnostic data from the V$SQL_MONITOR view.D、Enable real-time database operation monitoring using the DBMS_SQL_MONITOR.BEGIN_OPERATION function, and then use the DBMS_SQL_MONITOR.REPORT_SQL_MONITOR function to view the required information.
考题
问答题简述回波链长(ETL)的概念。
热门标签
最新试卷