In your test database， you have created the ORDERS table as an index-organized table （IOT）. To facilitate faster querying， you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrees when users perform a large volume of transactions. While investigating the reason， you find that the mapping table segment is fragmented， leading to poor performance. Which option would you use to defragment the mapping table without affecting the original table data？（） Export and import the mapping table.。 Drop and re-create the mapping table.。 Truncate the mapping table and reinsert the values.。 Use the ALTER TABLE .. REBUILD command to defragment the mapping table.。
参加职工基本医疗保险的个人，达到法定退休年龄时累计缴费达到国家规定年限的，退休后继续缴纳基本医疗保险费的，可按照国家规定享受基本医疗保险待遇。
Identify two situations in which you can use Data Recovery Advisor for recovery.（） The user has dropped an important table that needs to be recovered.。 The database files are corrupted when the database is open.。 You are not able to start up the database instance because the required database files are missing.。 The archived log files are missing for which backup is not available.。
对成功或失败进行归因时，属于个人内部的因素有（） 能力。 运气。 努力。 任务难度。
新型农村社会养老保险待遇由基础养老金和个人账户养老金组成。参加新型农村社会养老保险的农村居民，符合国家规定条件的，按月领取新型农村社会养老保险待遇。
Which code， inserted at line 14， sets the value of b to 314.159，26？（）
