Method 1 is worse (worst?). Your table is denormalized, and you will run into a maintainance nightmare.

It is not unusual to use denormalized tables in a data warehouse today, but in normal database, NO.

Don't worry about large table, as long as it is properly indexed, not a really big deal, how big can it be? The most important thing is to do it right.

In reply to Re: Efficiency MySQL question by pg
in thread [untitled node, ID 308077] by Samn

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