The initial insert of new data into the table will leave most of its large columns NULL, to be filled in later by subsequent updates.记录重未更新. PCTFREE 和 PCTUSED取值多少合适 ?
星级推荐: ★★★★
难度:
中级 试题类型:
选择题 立即发布笔记
提示:理解全文解析知识整体理论,详记重点知识段落,读懂原生代码(如有)思路,建议复制试题全文长期保存
|