A key is a set of attributes that is irreducibly unique and non-nullable within a table.
I'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-keyI need to remove a unique key from my mysql table. How can remove that using mysql query. I tried …
mysql sql unique-keyWhen should I use KEY, PRIMARY KEY, UNIQUE KEY and INDEX?
mysql indexing primary-key unique-key sqlperformanceI want to add complex unique key to existing table. Key contains from 4 fields (user_id, game_id, date, time). …
mysql unique-keyI'm using Entity Framework 5.0 Code First; public class Entity { [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public string EntityId { get; set;} public int …
entity-framework ef-code-first constraints multiple-columns unique-keyI have a table with a unique key for two columns: CREATE TABLE `xpo`.`user_permanent_gift` ( `id` INT UNSIGNED …
mysql sql unique-keyCan anyone explain about the purpose of PRIMARY KEY, UNIQUE KEY and KEY, if it is put together in a …
mysql sql-server primary-key unique-keyI've got an error on MySQL while trying to add a UNIQUE KEY. Here's what I'm trying to do. I've …
mysql unique unique-keyI tried to find it out in google but not satisfactory answer is given out there. Can anybody explain the …
primary-key unique-keyI have a following model in my project public class Category { public Guid ID { get; set; } [Required(ErrorMessage = "Title cannot …
c# ef-code-first entity-framework-4.1 unique-key