relational

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EF pulling out reference primary keys in a 1-M relationship

In a 1-M relationship, in the many side of the relationship I can pull out the Id of the parent item without doing another query using something like the following:[详细]

2022-12-21 15:10 分类：问答
mysql query normal relationship table vs concatenated realtionship table

I have a question about relationships between two tables. Let\'s say we have a table users, and links.[详细]

2022-12-21 06:15 分类：问答
Insert 2 rows that are related in both directions in SQL

I have two tables kinda like this: // Person.Details Table: PersonID int [PK] | EmployeeCreatorID int [FK] | FirstName varchar | OtherInfo...[详细]

2022-12-21 00:07 分类：问答
Terribly slow SQL query with COUNT and GROUP BY on two columns

I\'m archiving this web forum, which normally gets purged about once a week. So I\'m screen scraping it, and storing it into my database (PostgreSQL).[详细]

2022-12-20 23:00 分类：问答
Exclude rows with Doctrine ORM DQL (NOT IN)

I\'m building a chat application with codeigniter and doctrine. Tables: - User - User_roles - User_available[详细]

2022-12-20 20:03 分类：问答
Do I need an ORM for simple related queries in PHP/CI?

I started my app very simply following the documentation videos for Codeigniter. I have the following tables:[详细]

2022-12-14 09:53 分类：问答
How to store word compositions in a relational database in a normalized way?

I\'m trying to find a nice way to store word compositions of the following form: exhaustcleaningsystem[详细]

2022-12-12 12:17 分类：问答
mySQL - Insert into three tables

I recently asked this question. I have a relational database with three tables. The first containts id\'s[详细]

2022-12-11 11:08 分类：问答
mysql - query three tables

I have a relational database with three tables. The first containts id\'s that relate to the second. The second contains id\'s that relate to the third. The third contains the results I am after.[详细]

2022-12-11 07:22 分类：问答
SQL Server 'object'/'property' relational tables linking to other tables

Excuse the poor title, i can not think of the correct term. I have a database structure that represents objects, objects have types and properties.[详细]

2022-12-09 22:57 分类：问答