A key is a set of attributes that is irreducibly unique and non-nullable within a table.
Here we go again, the old argument still arises... Would we better have a business key as a primary key, …
database database-design primary-key keycreate table tablename ( id integer unsigned not null AUTO_INCREMENT, .... primary key id ); I need the primary key to start …
mysql primary-keySo, my professor gave me tables to insert it in a database but when I execute his code, MySQL is …
mysql duplicates primary-key mysql-error-1062What are the differences between Unique Key, Primary Key and Foreign Key with respect to concept of SQL? How they …
sql foreign-keys primary-key rdbms unique-keyI'm trying to learn how to use keys and to break the habit of necessarily having SERIAL type IDs for …
mysql key primary-keyCan anyone tell me what is the difference between a primary key and index key. And when to use which?
database primary-keyI was wondering can some give me an explanation on how to assign primary and foreign keys in pgAdmin? I …
postgresql foreign-keys primary-key pgadminI added a new ADO.Net Entity Data Model into my project and used the Update Wizard to add tables …
.net visual-studio-2008 entity-framework ado.net primary-keyI had a custom primary key that need to be set up on a particular data in a model. This …
django primary-key unique-keyI have a database view that yields a result set that has no true primary key. I want to use …
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