【Oracle】层次查询步骤,理解 where 条件执行顺序
文章目录 Oracle 层次查询1. 基本语法2. 实例验证2.1 不带where层次查询2.2 where HR 层次查询2.3 where IT 层次查询Oracle 层次查询 1. 基本语法 SELECT * FROM table_name WHERE condition START WITH condition1 CONNECT BY [NOCYCLE] PRIOR condition2;层析查询的执行顺…
2025-02-18