database - Single or multiple rows for a flag? -


on system users can have multiple settings, proper way of storing flags? flags in single row or have multiple rows?

single row be:

user_id       meta_key       meta_value 1             flags          000000

where 000000 different states of different flags. like, first bit profile visibility, second bit comments moderation, , on.

multiple rows be:

user_id       meta_key       meta_value 1             flag_profile   0 1             flag_comments  0 1             flag_wall      0 [...]

there many users , flags, , more flags may added in future, having 1 column each flag doesn't seem idea.


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