oracle中使用SQL遞歸語(yǔ)句的例子
oracle數(shù)據(jù)庫(kù)中如果需要使用SQL遞歸語(yǔ)句，應(yīng)該怎么寫(xiě)呢？下面就為您介紹一個(gè)oracle中使用SQL遞歸語(yǔ)句的例子，供您參考。
例子：
pid id
a b
a c
a e
b b1
b b2
c c1
e e1
e e3
d d1
指定pid=a，選出
a b
a c
a e
b b1
b b2
c c1
e e1
e e3
SQL語(yǔ)句：select parent,child from test start with pid='a'
connect by prior id=pid
Oracle SQL遞歸查詢語(yǔ)句：
1、表機(jī)構(gòu)
SQL> desc comm_org_subjection
Name Null? Type
----------------------------------------- -------- ----------------------------
ORG_SUBJECTION_ID NOT NULL VARCHAR2(32) 子鍵
ORG_ID NOT NULL VARCHAR2(32)
FATHER_ORG_ID NOT NULL VARCHAR2(32) 父鍵
LOCKED_IF NOT NULL VARCHAR2(1)
START_DATE NOT NULL DATE
END_DATE DATE
EDITION_NAMEPLATE NUMBER(8)
CODE_AFFORD_IF VARCHAR2(1)
CODE_AFFORD_ORG_ID NOT NULL VARCHAR2(32)
CODING_SHOW_ID NUMBER(8)
BSFLAG VARCHAR2(1)
MODIFI_DATE DATE
CREATOR_ID VARCHAR2(32)
CREATE_DATE DATE
CREATOR VARCHAR2(35)
2、遞歸查找父結(jié)點(diǎn) org_id為C6000000000001下的所有子結(jié)點(diǎn):
select * from comm_org_subjection a
start with a.org_id='C6000000000001'
connect by prior a.org_subjection_id=a.father_org_id
3、遞歸查找子結(jié)點(diǎn) org_id為C6000000000001下的所有父結(jié)點(diǎn):
select org_id from comm_org_subjection a
start with a.org_id='C6000000000001'
connect by prior a.father_org_id=a.org_subjection_id
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