When a non-redundant set of possible join combinations has been generated, the optimizer selects the plan that appears to have the lowest execution costs.
英
美
释义
当生成了非冗余的可能连接组合集时,优化器就选择看上去具有最低执行成本的计划。
把海词放在桌面上,查词最方便
触屏版
|
电脑版
©2003 - 2024 海词词典(Dict.cn)
立即下载