relational-database

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Data model or database system to use for large data tracker with custom user tags and fields

I want to create an application that allows keeping track of items and associated fields. For example, I may want to keep track of how much coffee I have drunk, and so I would create a coffee entry, a[详细]

2023-03-21 03:13 分类：问答
Prepared statement with a relational database

I could use some help on how to change this query $query = mysql_query(\"SELECT M.msg_id, M.uid_fk, M.message, M.created, U.username FROM messages M, users UWHERE M.uid_fk=U.uid and M.uid_fk=\'$uid\'[详细]

2023-03-20 20:40 分类：问答
How to set up a typical users HABTM roles relationship

I\'m quite new to this an开发者_如何学God I\'m using cancan + devise for my user auth. However I\'m not really sure what it means to set up a typical users HABTM roles relationship nor do I really und[详细]

2023-03-20 17:23 分类：问答
Creating a follow button? How to maximize efficiency?

I\'m using django.I want to create a follow button that once clicked will include the current user in the group of开发者_C百科 followers and then display the number of followers.There is a unfollow bu[详细]

2023-03-19 15:05 分类：问答
Is it necessary that the Foreign key of some table should be the candidate key of the same table?

Foreign key should necessarily be a candidate key for a table (sa开发者_运维技巧y table1)? I know that Foreign key references primary key of some other table (say table2). But for the table1, is it ne[详细]

2023-03-18 14:43 分类：问答
Zend Framework Relational Database

I\'m trying to figure out how to program referencial mapping with Zend Framework 1.11.x.I have 4 tables: person, cities, states, and countries.Each person has a city_id, state_id, and country_id assoc[详细]

2023-03-18 10:37 分类：问答
Should User and Address be in separate tables?

Currently my users table has the below fields Username Password Name Surname City Address Country Region TelNo[详细]

2023-03-17 18:37 分类：问答
DB integrity, Users and SSO

In an existing DB, we have several tables associated with a central USERS table. Tables such as list of old password or User\'s preferences are associated based on USER_ID column in the main USERS tab[详细]

2023-03-17 08:38 分类：问答
finding records with join on multiple relation tables

I have 3 tables. Tour Table (optional) Tour Tag Relation Table (optional_tag_rel) Tour Theme Relation Table (optional_theme_rel)[详细]

2023-03-16 14:00 分类：问答
How to build relations to Multiple IDs separated by comma in Yii

I was creating a form. Certian fields of the form uses checkbox and may return multiple choices and I have to store all of those IDs to a single field separated by a comma or semicolon.[详细]

2023-03-16 01:03 分类：问答