外鍵查詢

SELECT B.TABLE_NAME 
FROM ALL_CONSTRAINTS A, ALL_CONSTRAINTS B
WHERE A.TABLE_NAME = '表名'
 AND A.OWNER = SYS_CONTEXT('USERENV', 'CURRENT_SCHEMA')
 AND B.OWNER = SYS_CONTEXT('USERENV', 'CURRENT_SCHEMA')
 AND B.CONSTRAINT_TYPE = 'R'
 AND A.CONSTRAINT_NAME = B.R_CONSTRAINT_NAME;           

SELECT A.TABLE_NAME
FROM USER_CONS_COLUMNS A
LEFT JOIN ALL_CONSTRAINTS B
 ON A.CONSTRAINT_NAME = B.R_CONSTRAINT_NAME
WHERE B.CONSTRAINT_TYPE = 'R'
 AND B.TABLE_NAME = '表名';