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database - do I need multiple tables or single? -
i developing tool may got more million data fill in.
current have designed single table 36 coloumns. question need divide these multiple tables or single??
if single advantage , disadvantage
if multiple advantage , disadvantage
and engine use speed...
my concern large database have atleast 50000 queries perday..
any help??
yes, should normalize database. general rule of thumb if column isn't foreign key contains duplicate values, table should normalized.
normalization involves splitting database tables, , helps to:
- avoid modification anomolies.
- minimize impact of changes data structure.
- make data model more informative.
there plenty of information normalization on wikipedia.
if have serious amount of data , don't normalize, come point need redesign database, , incredibly hard retrospectively, involve not changing code accesses database, migrating existing data new design.
there cases might better avoid normalization performance reasons, should have understanding of normalization before making decision.
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