syntax 1 connect by [nocycle] start with syntax 2 start with connect by [nocycle] 实验之:scott用户下emp表 SQL> select * from emp; EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO --- --- --- --- --- --- --- --- 7369 SMITH CLERK 7902 1980-12-17 00:00:00 800 20 7499 ALLEN...
ConnectBy、Level、StartWith的使⽤ORACLE--Connect By、Level、Start With的使⽤(Hierarchical query-层次查询)Syntax 1CONNECT BY [NOCYCLE] <condition> START WITH <condition> Syntax 2START WITH <condition> CONNECT BY [NOCYCLE] <condition> 参考⽹址:http://asktom.oracle.com/pls/asktom/f?p=100...
6、CONNECT_BY_ROOT的使用,oracle10g新增connect_by_root,用在列名之前表示此行的根节点的相同列名的值。 1 SELECT LEVEL AS 等级, 2 CONNECT_BY_ISLEAF AS 是否是叶子节点, 3 CONNECT_BY_ROOT ENAME, 4 LPAD(' ', LEVEL * 2 - 1) || SYS_CONNECT_BY_PATH(ENAME, '=>'), 5 E.* 6 FROM EMP ...
6、CONNECT_BY_ROOT的使用,oracle10g新增connect_by_root,用在列名之前表示此行的根节点的相同列名的值。 1SELECTLEVELAS等级,2CONNECT_BY_ISLEAFAS是否是叶子节点,3CONNECT_BY_ROOT ENAME,4LPAD('',LEVEL*2-1)||SYS_CONNECT_BY_PATH(ENAME,'=>'),5E.*6FROMEMP E7CONNECTBYPRIOR E.EMPNO=E.MGR8STARTWIT...
syntax: select ... [start with initial-condition] connect by [nocycle] recurse-conditionlevel With level it is possible to show the level in the hierarchical relation of all the data.--oracle 9i sys_connect_by_path With sys_connect_by_path it is possible to show the entire path from ...
可见是全部level的树形结构,当扫描对象是dual时,即一个level只生成一条记录. 二、如何解决from dual只显示100行的问题: selectlevel from dual connectbylevel <=300 只显示100行,但据说只是9i的显示问题,解决方法如下: select * from (level from dual connectbylevel <=300) ...
syntax: select ... [start with initial-condition] connect by [nocycle] recurse-condition level With level it is possible to show the level in the hierarchical relation of all the data. --oracle 9i sys_connect_by_path With sys_connect_by_path it is possible to show the entire path from...
syntax: select ... [start with initial-condition] connect by [nocycle] recurse-condition level With level it is possible to show the level in the hierarchical relation of all the data. --oracle 9i sys_connect_by_path With sys_connect_by_path it is possible to show the entire path from...
operation_id = t.operation_id(+) ) SELECT pr.service_product_id FROM migora_cte WHERE nvl( UPPER( enabled_flag ) ,'Y' ) = 'Y' AND nvl( enabled_flag ,'Y' ) = 'Y' AND pr.product_code = rec_product1.service_product_code ORDER BY LEVEL; Parent topic: Oracle Syntax Migration ...
Oracel Connect By Function Version 10.2 Basic Syntax Elements START WITH<condition> CONNECT BY [NOCYCLE] <condition> CONNECT BY PRIOR A condition that identifies the relationship between parent rows and child rows of the hierarchy CONNECT BY <child_value> = <parent_value> ...