The traditional way is to have 3 columns.

User ColNo Value
A    1    A1
A    2    A2
B    1    B1
B    2    B2
B    3    B3
B    4    B4
B    5    B5

There are more flexible databases such as mongoDb

poj

In reply to Re^2: DBI Update dynamically by poj
in thread DBI Update dynamically by Anonymous Monk

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