查看表是否与其他表存在主外鍵约束

通过以下SQL语句：

 

          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.table_name='DT_AS_SERVICE_DISPATCH'