INSERT … ON DUPLICATE KEY (do nothing)
I have a table with a unique key for two columns: CREATE TABLE `xpo`.`user_permanent_gift` ( `id` INT UNSIGNED NOT NULL AUTO_INCREMENT , `fb_user_id` … Read more
unique-key
Difference between Key, Primary Key, Unique Key and Index in MySQL
When should I use KEY, PRIMARY KEY, UNIQUE KEY and INDEX? 8 Answers 8
difference between primary key and unique key
I’m using mysql database. I have a confusion between primary key and unique key. Please help me where should I create primary and … Read more
Unique Key constraints for multiple columns in Entity Framework
I’m using Entity Framework 5.0 Code First; public class Entity { [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public string EntityId { get; set;} public int FirstColumn { … Read more