Should the user\'s Account balance be stored in the database or calculated dynamically? For accurate results calculating it dynamically make sense but then it might be a problem, when there are many
I\'m a newbie in JPA, and this question is about recommended ways to work with JPA relationships. I have entities Data and Subject, I can either create a ManyToOne relationship between them, or not.
I have some flexibility here so I\'m looking for some advice before I lock things down. I also have a couple ways of solving this problem but I\'m looking for advise on the most efficient way of doing
Structure TableA (each row in TableA can map to one or more row in circle) Id Name TableB (each row in TableB can map to only one row in TableA)
I am a database designer with an existencial doubt. If you have a table1 that must have a relation with table2 or (exclusive or, one or another) table3,
I\'m trying to figure out the best way to set up my tables/model associations. I have a table of movies.Each Movie could have zero or many Actors, Directors, Publishers, Writers... etc.
Let\'s say my database tracks bird sightings (Note: I\'m really scraping the bottom of the barrel for examples).
This is a simplified version of my database, with the actual problem applied to a different subject area.
When do we need to use a 1-to-1 relati开发者_运维百科onship in database design? In my opinion, if two tables are in a 1-to-1 relationship, they can be combined into one table. Is this true?
I have 2 MySQL tables with the following schemas for a web site that\'s kinda like a magazine. Article (articleId int auto increment ,
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