Oracle 递归查询

select a.accountcodeid, a.accountcode, a.accountcodename, 2 SYS_CONNECT_BY_PATH(a.accountcodename, ‘\‘) as fullname, a.parentcodeid, level 3 from fm_accountcode a 4 where a.accountcodeid >= 10000 5 start with a.parentcodeid is null 6 connect by prior a.accountcodeid = a.parentcodeid; 7 8 select a.accountcodeid, a.accountcode, a.accountcodename, 9 SYS_CONNECT_BY_PATH(a.accountcodename, ‘\‘) as fullname, 10 a.parentcodeid 11 from fm_accountcode a 12 where a.accountcodeid > 10000 13 and connect_by_isleaf = 1 14 start with a.parentcodeid is null 15 connect by prior a.accountcodeid = a.parentcodeid;

oracle 中递归查询，对树型结构数据相当有用。

二者区别：上，所有数据，包含结构；下，所有末节点，包含结构，具体参见Oracle Document 11g。

Oracle 递归查询

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