How to determine the reading state of an article

Source: Internet
Author: User
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I want to use PHP to do a message publishing system, the database has a user table and an article table, now need to determine whether an article is read according to the user click, I have more than 3,000 users, if you want to according to each user on the reading state of an article to judge, that is not every article has more than 3,000 data, Ask to do this system of ideas?

Reply to discussion (solution)

Set a read table, 2 fields: User ID and article ID
Add a record to this table whenever you read an article
Where not on this table, is unread

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