Top "Unique-constraint" questions

Unique-constraint is an index that sets one or multiple fields to be unique in a data entity

How to create unique CONSTRAINT to relationship by neo4j cypher?

How to create unique CONSTRAINT to relationship by neo4j cypher?

neo4j unique unique-constraint
SQL Server unique constraint problem

How to create a unique constraint on a varchar(max) field in visual studio, visually. the problem is when i …

sql sql-server visual-studio-2010 unique-constraint
Why dropping a primary key is not dropping its unique index?

I have a table with Col1 and Col2 as a composite primary key pk_composit_key and a unique index …

oracle unique-constraint composite-primary-key
duplicate null value violation on UNIQUE KEY constraint in Mssql

MS SQL Server does not ignore the null value and considers it as violation for the UNIQUE KEY constraint but …

sql-server database null unique-constraint
How to create a unique constraint just on the date part of a datetime?

I'm writing a very simple blog engine for own use (since every blog engine I encountered is too complex). I …

sql sql-server sql-server-2008 datetime unique-constraint
How to find out line number, procedure name in PL/SQL in case of an error

I am using a D2k 6i form and getting the error on form from stored database(oracle9i) procedure …

oracle plsql unique-constraint ora-00001
Create Unqiue case-insensitive constraint on two varchar fields

In Oracle 10g, how do I add a unique case-insensitive constraint on two varchar fields? For example, given the following …

sql oracle10g unique-constraint
Finding ghost constraint from Oracle DB

I had a constraint in a table CREATE TABLE "USERSAPPLICATIONS" ( "USERID" NUMBER NOT NULL , "APPLICATIONNAME" VARCHAR2 (30) NOT NULL , CONSTRAINT "PK_…

sql oracle unique-constraint ora-00001
Slugify string in Django

I have developed a form, where the user adds his/her first name and last name. For the username (a …

python django string unique-constraint
hibernate column uniqueness question

I'm still in the process of learning hibernate/hql and I have a question that's half best practices question/half …

java hibernate unique-constraint sanity-check