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how create best schema database with ratings system and available in month?

开发者 https://www.devze.com 2023-03-15 03:54 出处:网络
i will create schema the database MySQL. There are username, password etc and rating system and available in month.

i will create schema the database MySQL. There are username, password etc and rating system and available in month. Standard it looks like this:

id | username | password | january | february | march     | rating1 | rating2| rating3 |
1  | john     |  xxx     | 1       |  0       | 1         |  3      | 3      | 6
2  | amy      |  xxx     | 1       |  1       | 0         |  1      | 6      | 3

if a user buys article then must add a rating (1,2,3). if chose 2 in John then rating2 +1

id | username | password | january | february | march     | rating1 | rating2| rating3 |
1  | john     |  xxx     | 1       |  0       | 1         |  3      | 4      | 6
2  | amy      |  xxx     | 1       |  1       | 0         |  1      | 6      | 3

january, february (1 - available, 0 - not available)etc set himself John or Amy.

this is good? Should I create separate tables for Januar/feb/march and ra开发者_C百科ting1/2/3? Maybe only for rating?


im not a hard core database designer but at a glance this is schema is not normalized.

if you can create a separate table for month and rating would be better please find the below sample

d | username | password

1 | john | xxx
2 | amy | xxx

id | month | rating

1 | 1 | 3

MonthID | MonthName

1 | January

How ever this sujjestion may not be the ideal solution for your proposed database.


OK I know this is late but this is very serious!!!

First use bcrypt for encrypting passwords

Second NEVER store a password that is not encrypted properly. You need a "salt" to do this correctly.

See here: http://www.nathandavison.com/posts/view/13/php-bcrypt-hash-a-password-with-a-logical-salt

I'm not a php guy but it looks good.

As for the DB, Prabhakantha's answer looks OK but might not be complete suitable.

Users

id | username | password | salt

1  | john     | xxx      | blah
2  | amy      | xxx      | ughh

ratings

id | month_id | rating
1  | 1        | 3

Months

id | month   | year
1  | January | 1990

I know in the ruby on rails world I would model this with a polymorphic association. Take a look how that works here: http://railscasts.com/episodes/154-polymorphic-association

Yes it is a video on rails but it applies here.

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