A key is a set of attributes that is irreducibly unique and non-nullable within a table.
I started by googling, and found this article which talks about mutex tables. I have a table with ~14 million records. …
php mysql sql primary-key sql-insertCan I have multiple primary keys in a single table?
database database-design primary-key composite-primary-keyI have an existing table called Persion. In this table I have 5 columns: persionId Pname PMid Pdescription Pamt When I …
sql sql-server sql-server-2008 constraints primary-keyI'm using mysql database. I have a confusion between primary key and unique key. Please help me where should I …
mysql sql database primary-key unique-keyAs the title, I have an existing table which is already populated with 150000 records. I have added an Id column (…
sql-server sql-server-2008 primary-key alter-tableI have the following table schema which maps user_customers to permissions on a live MySQL database: mysql> describe …
mysql sql database-design primary-key mysql-error-1075I have a table called provider. I have three columns called person, place, thing. There can be duplicate persons, duplicate …
mysql sql primary-key alter-table composite-primary-keyHere is a gross oversimplification of an intense setup I am working with. table_1 and table_2 both have auto-increment surrogate …
mysql primary-key myisam composite-key composite-primary-keyI am using Entity Framework 1 with .net 3.5. I am doing something simple like this: var roomDetails = context.Rooms.ToList(); foreach (…
c# asp.net .net entity-framework primary-keyI ran into the problem that my primary key sequence is not in sync with my table rows. That is, …
postgresql primary-key database-sequence