In my database, is it standard to leave most fields with default value "none"? For example a user id, a post title, category, or tags.
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- dqoqnmb163241 2011-01-20 18:20关注
For required fields such as username or password, you should set
NOT NULL
. For other optional fields you can set it toNULL
. For numbers, it is almost always a good idea to set default value to zero0
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