Rules of thumb for field sizes?
Posted by: Macamba .
Date: November 16, 2015 07:29AM

When designing tables, are there rules of thumb for field sizes? At the moment, while I am designing my Java application I defined my (for example) address table as:

	(add_id int primary key auto_increment, 
	 perident varchar(64), 
	 street varchar(64), 
	 number varchar(64), 
	 postcode varchar(6), 
	 city varchar(64), 
	 telephone varchar(64), 
	 email varchar(64) );

That might be a bit excessive (why?)

PS. the field 'perident' stands for personnel identifier, consisting of first initial and family name

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Rules of thumb for field sizes?
November 16, 2015 07:29AM

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