oracle SQL解析步骤小结建站知识
导读:1建站知识oracle SQL 解析 步骤,爱好oracle的朋友可以参考下,了解工作流程。网站seo优化软件高端网站建设。
1 T网站建设公司he syntax of the SQL statement is verified. SQL的语法检查 2 The data网站优化seo培训 dictionary is searched to verify table and column definitions. 从数据字典检查表名和字段名 3 The data dictionary is searched to verify security privileges on relevant objects. 从数据字典中检查权限 4 Parse locks are acquired on the relevant objects. 解析相关对象的锁 5 The optimal execution plan is determined. 选在执行计划运行SQ网站seo优化培训L 6 The statement is loaded into the shared SQL area (also known as the library cache) in the shared pool of the system global area (SGA). 执行后SQL语句放在SGA的SQL共享区相关网站seo优化软件高端网站建设。
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