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Question about performance

Question asked by grouper on Sep 19, 2014
Latest reply on Sep 19, 2014 by philmodjunk


Question about performance



I 've created a database with clients (master table) ---- appointments(child) (some other tables are present, but these 2 are the major ones) . Each appointment includes about 500 possible fields, most of which are either 0 or 1. With growing number of clients (i.e 1000), this should mean about 500,000 possible fields. However, in the vast majority of appointments, not more than 20-30 fields are filled in. The rest are null.

My question is : do the null fields affect database performance to the same degree as filled-in fields? Should i be concerned about the structure and future performance of the database?