In which two cases would you use an outer join? （） The tables being joined have NOT NULL columns.。 The tables being joined have only matched data.。 The columns being joined have NULL values.。 The tables being joined have only unmatched data.。 The tables being joined have both matched and unmatched data.。 Only when the tables have a primary key/foreign key relationship.。
To generate recommendations to improve the performance of a set of SQL queries in an application, you execute the following blocks of code: The blocks of code execute successfully; however, you do not get the required outcome. What could be the reason?（） A template needs to be associated with the task.。 A workload needs to be associated with the task.。 The partial or complete workload scope needs to be associated with the task.。 The type of structures (indexes, materialized views, or partitions) to be recommended need to be specified for the task.。
美国微软公司起诉亚都公司软件侵权案，使亚都面临近千万的赔偿。双方陷入的危机属于（）。 宏观环境制约型危机。 供应危机。 品牌危机。 产品质量危机。
A customer has installed an IBM System Storage DS8700 with 20 TB of storage, 32 GB cache, and 16 Fibre Channel ports. The customer is beginning to experience throughput performance issues since they have added new workloads. The customer asks the storage specialist for guidance. Which of the following actions should be recommended as a first step?（） install the Performance Accelerator feature。 review the DS Storage Manager Major Event Log (MEL)。 add an expansion frame with additionalFibre Channel ports。 review the latest TPC for Disk study to identify the source of the performance issue。
聚乙烯塑料管一般应用于（）管道中的埋地管道部分。 水。 燃气。 原油。 乙烯。
不接地中性线相色漆规定涂为（）色。
