How to link a field within the table with its other fields

سأل 2018-07-12 14:08:36 +0200

الصورة الرمزية للعضو ayman20111a

updated 2018-07-13 23:49:57 +0200

How can I link a field to other fields that are followed by it? For example, I have a table of topics and there are some fields that need sub-data such as field operating systems, protection programs, YouTube channels All these fields need other fields to write their data from how they can implement this idea

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