What is the essence of this problem?

K

killsxs2020-04-23 12:18:30

MySQL

killsxs, 2020-04-23 12:18:30

When creating a link, it gives an error: there is no index in the column. What's wrong?
I'm trying to bind the id of the users table and the user_id of the calculation table.

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2 answer(s)

K

killsxs, 2020-04-23
@killsxs

Generally. You just needed to add an indexed key and voila

A

Anton Vanin, 2020-04-23
@vanton

The difference between int(11) and int(12)

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