[转载]Oracle查看表之间的键关联关系

SELECT
    A .CONSTRAINT_NAME ,
    A .TABLE_NAME ,
    B.CONSTRAINT_NAME 
FROM
    USER_CONSTRAINTS A,
    USER_CONSTRAINTS B
WHERE
    A .CONSTRAINT_TYPE = 'R'
AND B.CONSTRAINT_TYPE = 'P'
AND A .R_CONSTRAINT_NAME = B.CONSTRAINT_NAME
AND A .CONSTRAINT_NAME = 'FK_T_ACCT_C_REFERENCE_T_LOAN'

P 代表主键
R 代表外键

参考地址：http://www.2cto.com/database/201304/204969.html