I am designing the database for social web site. should I consider using UUID or GUID for primary key at all?
I do not get an object from this setup table SPEC ( Special_Name varchar2 pk Signal integer Created_At date)
I am new to databases.If I m开发者_如何转开发ake a primary key with two columns, userId and dayOfWeek.How can I search this primary key?
I have a legacy database imported into sql server 2008 r2 that contains no indexes and no primary/foreign keys for hundreds of tables (some with hundreds of columns). The primary keys which I\'ve iden
I was wondering whether there is a possibility for me to discover the underlying primary (or unique) key columns for all tables involved in an Oracle view. Here\'s an example to show what I mean:
I\'m currently trying to implement the repositories for my domain objects with the RC of Entity Framework 4.1 and its code first approach.
Will it ever happen that we design a table that doesn\'t need a pr开发者_StackOverflow中文版imary key?No.
I am working on with Core Data. I need to keep a unique value of bandID within Core Data. In my data model i am having
Say I\'m storing webpages in PostgreSQL. Is it more convenient to use the URL of the webpage as the primary key, or to create a more succinct SERIAL in开发者_JAVA技巧teger primary key?What is the reco
Entity Framework 4 Returning KEY/Primary Key I’m Trying to find a way to Return a Key/Primary Key without having to create a stored procedure to do it for me using:
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