oracle中查询、禁用、启用、删除表外键

1.查询所有表的外键的：

select table_name, constraint_name from user_constraints where constraint_type = ‘R‘;

 

2.禁用所有外键约束, 使用下面的sql生成对应sql脚本:

select ‘alter table ‘ || table_name || ‘ disable constraint ‘ || constraint_name || ‘;‘ from user_constraints where constraint_type = ‘R‘;

生成的sql类似下面的语句：

alter table BERTH disable constraint BERTH_FK;

alter table BOLLARD disable constraint BOLLARD_FK;

alter table YARD_UNAVAIL_REGION disable constraint YARD_UNAVAIL_REGION_FK;

 

3.启用所有外键约束, 使用下面的sql生成对应sql脚本:

select ‘alter table ‘ || table_name || ‘ enable constraint ‘ || constraint_name || ‘;‘ from user_constraints where constraint_type = ‘R‘;

生成的sql类似下面的语句：

alter table BERTH enable constraint BERTH_FK;

alter table BOLLARD enable constraint BOLLARD_FK;

alter table YARD_UNAVAIL_REGION enable constraint YARD_UNAVAIL_REGION_FK;

 

4.删除所有外键约束, 使用下面的sql生成对应sql脚本:

select ‘alter table ‘ || table_name || ‘ drop constraint ‘ || constraint_name || ‘;‘ from user_constraints where constraint_type = ‘R‘;

生成的sql类似下面的语句：

alter table BERTH drop constraint BERTH_FK;

alter table BOLLARD drop constraint BOLLARD_FK;

alter table YARD_UNAVAIL_REGION drop constraint YARD_UNAVAIL_REGION_FK;

原文：http://www.cnblogs.com/ego/p/5189861.html

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