unique-key Archives - IT Nursery

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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` ...

May 26, 2022
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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

May 19, 2022
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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 ...

May 18, 2022
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Unique Key constraints for multiple columns in Entity Framework

I’m using Entity Framework 5.0 Code First; public class Entity {...

May 18, 2022
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