The Relationship Specification has a detailed description of where the documentation is?

How To
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On update and On delete, what’s the effect? Where can I find the relevant documentation?

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Hi Donie,

It is foreign key’s on update/delete option:

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Hi Kit.So

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What’s Cascade , Set null , Set default, Restrict, No action?

What is the impact after the selection?

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You can refer to database documentation, e.g. MySQL:
https://dev.mysql.com/doc/refman/8.0/en/create-table-foreign-keys.html#foreign-keys-referential-actions