A key is a set of attributes that is irreducibly unique and non-nullable within a table.
I would like to define a unique key for records based on 2 columns : 'id' and 'language' to let the user …
ruby-on-rails primary-key composite-primary-keyI've had to change a table in my database so that the primary key isn't the standard increments. Here's the …
php laravel migration primary-key laravel-artisanI have simple table creating script in Postgres 9.1. I need it to create the table with 2-attributes PK only if …
sql postgresql primary-key alter-table postgresql-9.1HI, Using: SQL Server Database: Northwind I'd like to drop a table primary key, without knowing the PK constraint name.. …
sql sql-server primary-keyIs there a way to change existing primary key type from int to serial without dropping the table? I already …
postgresql primary-key auto-incrementWhat is the SQL command to add a (primary) key to a table in SAP HANA? The ALTER TABLE docu …
key primary-key hana alter-tableI have created table name as d with ID column as primary key and then just inserted records as shown …
postgresql indexing primary-keySo I have a table with an identity column as the primary key, so it is an integer. So, why …
sql-server primary-key scope-identityIn a fairly animated discussion in my team I was made to think what most people like as primary keys. …
algorithm database-design relational-database primary-key ddlI am trying to drop an index : DROP INDEX PK_CHARGES but I get this error cannot drop index used …
oracle primary-key unique-index