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外国关键制约因素
原标题:foreign key constraint
  • 时间:2010-10-02 06:17:29
  •  标签:
  • mysql

我很麻烦地用高超钥匙编辑我方言中的数据。 当我试图更新外国钥匙时,它说:

不得添加或更新儿童行文:外国关键制约因素失败(sadsystem/products,CONTRAINTfk_ProductRelationship11。 签署:<代码>_id REFERENCES product_sizes (size_id)

问题回答

http://www.postgresql.org/docs/9/static/sql-set-constraints.html” rel=“nofollow” Owner=“SETCONTRAINTS”

然而,MySQL/Inno 亚洲开发银行不支持这一点。 您必须按一致顺序编辑数据:也就是说,你首先必须在<编码>产品_sizes上建立目标行。 您可参考其<代码>_id。 其他表格。

(如果你知道你会做些什么(例如进口数据),你还可以暂时取消

当你更新一栏是外国钥匙的一部分(或全部)时,完整的外国钥匙的新价值必须在参考表格中注明一行。 错误的信息是,你试图更新在参考表格中不存在的价值的外国钥匙。





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