Which method would you use to undo the changes made by a particular transaction without affecting the changes made by other transactions？（） point-in-time recovery。 execute the ROLLBACK command with transaction number。 flashback the database to before the transaction was committed。 determine all the necessary undo SQL statements from FLASHBACK_TRANSACTION_QUERY and use them for recovery。
在一次国际学术研讨会上，外国学者引用了2，300多年前中国思想家的名言：“天时不如地利，地利不如人和。”这位思想家是（）。 老子。 孔子。 孟子。 荀子。
高晓声描写“小人物”命运的《（）》和“陈奂生系列小说”等作品，被誉为“农民组曲”。
You create a master-detail form. The users need to be able to exit the form quickly, adhering to default transaction processing, regardless of the cursor location. You believe you can achieve this using a Key-Exit trigger. What do you need to do to implement this request? （） Define a Key-Exit trigger for all the blocks in the form. 。 In the Object Navigator, highlight all the items and define a Key-Exit trigger. 。 Define a Key-Exit trigger on the primary key item in the master block.。 No additional key-trigger definition is necessary.。
省级以上人民政府将社会保险事业纳入国民经济和社会发展规划。
In which situation may the UNDO_RETENTION parameter be ignored， even if it is set to a value（）
