You find that the execution time of reports in your datawarehouse application is significantly high. You suspect the lack of indexes to be the reason for the degradation in performance. Which advisory component would you refer to， in order to determine the appropriate indexes？（） Memory Advisor。 Segment Advisor。 SQL Access Advisor。 Automatic Workload Repository （AWR）。 Automatic Database Diagnostic Monitor （ADDM）。
地下防水混凝土裂缝形成原因包括（）。 配合比设计。 养护不合理。 施工不规范。 原材料选用。
You enabled Flashback Data Archive on the INVENTORY table. Which DDL operation is supported on the table after enabling Flashback Data Archive？（） Drop the table.。 Partition the table.。 Truncate the table.。 Add a column to the table.。 Rename a column in the table.。
独立避雷针的接地装置与变电所接地网间应保持地中距离为（）。 3米。 4米。 5米。
Which statement is true about XpauseTarget in Oracle JRockit JVM ？ （） This option is supported by all type of Garbage collection modes.。 This option is only supported by Generational Garbage Collection mode.。 This option is only supported by Mark and Sweep Garbage Collection mode.。 This option is only supported by Dynamic Garbage Collection mode.。
我国古代天文历法的突出成就实质上反映了（）。
