I\'m going to re-phrase this question: I have 2 tables that are unrelated. There is an instance where the two tables might need to be related:
Lets suppose I have a scenario with the following model: An Animal table which represents any开发者_StackOverflow中文版 animal, a Dog table and a Bird table, each one with a 1:1 relationship with the
EDIT Please view the following image, it details the PICTURES which show that only ADO.NET ENTITY FRAME WORK DOESNOT recognize one to many
Closed. This question is 开发者_StackOverflow中文版opinion-based. It is not currently accepting answers.
Here is a small design with the common NOT NULL UNIQUE constraints on the natural keys: CREATE TABLE \'users\' {
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form. For help clari
Assume there are two models: User and Question. I can use @OneToMany to indicate that one user can have multiple questions. Now if I want to allow user to follow one or more questions, should I build
I have a table with a column that is an I开发者_如何学JAVAD to either table T1 or table T2. Is it a good idea to add an extra column that indicates if that ID is from T1 or T2, or should I do it diffe
I have a database table with some fields, one of them, cost, is set to the DECIMAL data type. I set the parameters to 4,2, which should allow 4 numbers before the decimal point, and 2 afterwards.
TL;DR what\'s the best way to migrate lots of data between one very poorly structured database (with much repetition of columns, no interrelations, and duplicate data), to another highly organised and
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