一.基本语法 connect by递归查询基本语法是: select 1 from 表格 start with ... connect by prior id = pId start with:表示以什么为根节点,不加限制可以写1=1,要以id为123的节点为根节点,就写为start with id =123 connect by:connect by是必须的,start with有些情况是可以省略的,或者直接start with 1=1不加限制 prior:prior关键字可以放在等号的前面,…
直接在oracle 递归查询语句 select * from groups start with id=:DeptId connect by prior superiorid =id 往下找 select * from groups start with id=:DeptId connect by prior id=superiorid…
最近学习oracle的一些知识,发现自己sql还是很薄弱,需要继续学习,现在总结一下哈. (1)oracle递归查询 start with ... connect by prior ,至于是否向上查询(根节点)还是向下查询(叶节点),主要看prior后面跟的字段是否是父ID. 向上查询:select * from test_tree_demo start with id=1 connect by prior pid=id 查询结果: 向下查询:select * from test_tree…
oracle中 connect by prior 递归算法 -- 理解 http://blog.163.com/xxciof/blog/static/7978132720095193113752/ oracle中 connect by prior 递归算法 Oracle中start with...connect by prior子句用法 connect by 是结构化查询中用到的,其基本语法是: select ... from tablename start with 条件1 connect…
1.12C 连接方式 PDB is not an instance, so using SID in the connection string will not work. When the database is an Oracle Database 12c container database, the client must specify a service name in order to connect to it. Listener status shows TEST as on…
