A key is a set of attributes that is irreducibly unique and non-nullable within a table.
I'm currently building a project which involves a lot of collective intelligence. Every user visiting the web site gets created …
python django primary-key auto-increment bigintegerIn a database where all of your primary keys are GUIDs, what are the differences/implications and/or pros and …
sql-server-2005 primary-key identityIf I define a column as a primary key in MySql, is it also unique key by default or do …
mysql primary-key unique-keyMy table structure is: CREATE TABLE IF NOT EXISTS `users_settings_temp` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `userid` …
mysql primary-key insert-update database-tableIn Sql Server, I have a table with an Identity primary key. Often I want the latest few new records, …
sql-server indexing primary-keyI have heard a few references that pk is not required on fact table. I believe every single table should …
database-design primary-key data-warehouse fact-tableWent searching and didn't find the answer to this specific noob question. My apologies if I missed it. In a …
sql mysql primary-key indexingI am using Spring's NamedParameterJdbcTemplate to perform an insert into a table. The table uses a NEXTVAL on a sequence …
spring oracle10g primary-key jdbctemplate spring-jdbcI have a table which has a clustered index on two columns - the primary key for the table. It …
sql sql-server-2005 indexing primary-key clustered-indexThe following code creates a table without raising any errors: CREATE TABLE test( ID INTEGER NULL, CONSTRAINT PK_test PRIMARY …
postgresql constraints primary-key ddl postgresql-9.3