Oracle 外键查询sql
1.
select pk.table_name, fk.table_name, fk.constraint_name
from user_constraints pk, user_constraints fk
where fk.constraint_type = 'R'
and fk.r_constraint_name = pk.constraint_name
and pk.table_name = '&pk_table_name'
from user_constraints pk, user_constraints fk
where fk.constraint_type = 'R'
and fk.r_constraint_name = pk.constraint_name
and pk.table_name = '&pk_table_name'
2.
select a.table_name 外键表名,a.column_name 外键列名,b.table_name 主键表名,b.column_name 主键列名
from
(select a.constraint_name,b.table_name,b.column_name,a.r_constraint_name
from user_constraints a, user_cons_columns b
WHERE a.constraint_type='R'
and a.constraint_name=b.constraint_name
) a,
(select distinct a.r_constraint_name,b.table_name,b.column_name
from user_constraints a, user_cons_columns b
WHERE a.constraint_type='R'
and
a.r_constraint_name=b.constraint_name)
b
where a.r_constraint_name=b.r_constraint_name
from
(select a.constraint_name,b.table_name,b.column_name,a.r_constraint_name
from user_constraints a, user_cons_columns b
WHERE a.constraint_type='R'
and a.constraint_name=b.constraint_name
) a,
(select distinct a.r_constraint_name,b.table_name,b.column_name
from user_constraints a, user_cons_columns b
WHERE a.constraint_type='R'
and
a.r_constraint_name=b.constraint_name)
b
where a.r_constraint_name=b.r_constraint_name
参考文献：
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/9252210/viewspace-676965/ ，如需转载，请注明出处，否则将追究法律责任。
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