Select b.table_name 主键表名,
b.column_name 主键列名,
a.table_name 外键表名,
a.column_name 外键列名 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
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