foreign-keys

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Insert multiple records issue (linq EF)

I need to insert multiple records to different tables, the problem is that some tables have 2 different foreing keys and the EF throws me an exception. Part of my schema is shown below.[详细]

2023-04-13 08:09 分类：问答
sql foreign key error

i want to create these two tables but i\'m getting an error which says SECTION keys that being referenced by foreign keys of HOLD are not primary key. as it\'s seen in the query they are primary keys.[详细]

2023-04-13 04:39 分类：问答
Foreign key shortcuts in table

Imagine a schema as such. NOTE TABLE:NoteID, Note, DetailedTaskID, ..... DETAILED TASK TABLE:DetailedTaskID, WorkOrderID, .....[详细]

2023-04-12 21:10 分类：问答
How to insert into table which contain foreign key

i\'m newbie, i gotta problems, i cannot update table upload since i was insert foreign key from table request in there[详细]

2023-04-12 16:10 分类：问答
Nesting of groups or elements

I\'m fairly new in Mysql, but I have problem that I cannot solve. I will give you an example to demonstrate it. Please note that I know that (for current example) there are other simpler and more effi[详细]

2023-04-12 11:31 分类：问答
FluentNHibernate on a Oracle database, nullable foreignkey (Classic issue?)

Im in a bit of a jam. Problem NHibernate forces me to make a foreignkey column nullable, which is a very bad idea for our database and quite ugly.[详细]

2023-04-12 03:59 分类：问答
MySQL express constraint as calculated column?

Columns: id INT, provice_id INT, is_province BIT Foreign key: province_id references City (id) I\'d like to express the concept: when id == province_id then is_province == 1. How can i express this?[详细]

2023-04-12 02:46 分类：问答
Django: working with a multiple foreign key model

Django foreign keys are driving me crazy! I\'m new to Django, and I\'ve been working on a solution to what I know must be a very simple problem for over three weeks with no success. I\'ve searched for[详细]

2023-04-12 02:43 分类：问答
Symfony2 OneToOne relationship becomes either a Unique index or a foreign key?

I\'m开发者_Go百科 taking my first steps in Symfony2 entity relations. I have an entity installation, which each has one meter, and one monitor.[详细]

2023-04-11 23:56 分类：问答
Errors [42S01][1050] and [HY000][1025] when trying to add foreign key to table in MySQL

I am trying to add a foreign key to an existing table like this... alter table expeditedaddress add foreign key[详细]

2023-04-11 14:43 分类：问答