Creating tables

[jperana]

Is it efficient for me to have 1 table per user account? rather than 1 table many user many columns.?

[si_the_geek]

Multiple copies of a table is not efficient. It makes coding and maintenance much harder, and is likely to increase the storage space needed.

For similar reasons (but to a lesser degree) multiple columns is not good either - what you should be aiming for is multiple rows (in this case one row per user account).