Unique-index is an index that sets one or multiple fields to be unique in a data entity
Below is the use case: I have a unique index defined on 3 columns say A,B,C. Assume the values …
java hibernate unique-constraint unique-indexI have the following in my migration file def self.up create_table :payment_agreements do |t| t.boolean :automatic, :…
ruby-on-rails migration unique-index validates-uniqueness-ofI have a registration form in which users can fill in two email address (email1 & email2). Marketing's requirement is …
cakephp unique-index cakephp-modelHow can I check whether a field from a table is set as UNIQUE? For example I have a table …
php mysql indexing unique-indexOften when I define a View in Navicat I receive the following message: xxx does not have a primary key. …
mysql views primary-key unique-index navicatIf so - What must change in this table ? CREATE TABLE contestants ( idContestants int(10) unsigned NOT NULL AUTO_INCREMENT, idEvent …
mysql unique-indexI have a table that stores comments users make about images on the site. The table is structured with four …
mysql unique-indexHere's a little experiment I ran in an Oracle database (10g). Aside from (Oracle's) implementation convenience, I can't figure out …
oracle null nullable constraints unique-indexLet's have a simple table of products. Each produch has its unique ID and category. Users often search by category …
mysql partitioning unique-indexOn one of my PostgreSQL tables, I have a set of two fields that will be defined as being unique …
postgresql indexing unique-constraint unique-index