I would like to change the layout of my production database, I would like
to add a column to an existing table. As I think before the ALTER TABLE
statement all access to the database should be denied/ended, then the ALTER
TABLE should be performed, and then user/applications should be able to use
the database once again.
My tables is quite small ~4MB data & indexes.
So is the ALTER TABLE on a running/opened to clients database/table
desirable or should it be run when all access to the database/table is