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执行以下sql生成的语句即可
删除所有外键约束
select ‘alter table ‘||table_name||‘ drop constraint ‘||constraint_name||‘;‘ from user_constraints where constraint_type=‘R‘
禁用所有外键约束
select ‘alter table ‘||table_name||‘ disable constraint ‘||constraint_name||‘;‘ from user_constraints where constraint_type=‘R‘
启用所有外键约束
select ‘alter table ‘||table_name||‘ enable constraint ‘||constraint_name||‘;‘ from user_constraints where constraint_type=‘R‘
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原文地址:http://www.cnblogs.com/yangw/p/5192109.html