ArcerZhang`s Technology Blog

摘要： SequencesA sequence:Can automatically generate unique numbersIs a shareable objectCan be used to create a primary key valueReplace application codeSpeeds up the efficiency of accessing sequence values when cached in memory.CREATE SEQUENCE Statement SyntaxDefine a sequence to generate sequential numb 阅读全文

摘要： ObjectivesAfter completing this lesson,you should be able to do the following:Create simple and complex views.Retrieve data from views.Create,maintain,and use sequences.Create and maintain indexes.Create private and public synonyms.Lesson AgendaOverview of views-Creating,modifying,and retrieving dat 阅读全文