How to define two fields “unique” as couple

How to define two fields "unique" as couple



1.django - How to define two fields "unique" as couple ...

Description:Is there a way to define a couple of fields as unique in
Django? I have a table of volumes (of journals) and I don't want more then
one volume number for the same ...



2.How to: Define Relationships Between Tables Using Access ...

Description:Relationships are the established associations between two or
... to NOT NULL or UNIQUE, or you can define a check ... and last name
fields to be unique, ...



3.How to do a combination of two fields and define this ...

Description:How to do a combination of two fields and define this
combination as unique; ... In this case, the combination of the two fields
would be defined as unique. ...



4.Identity fields in Oracle and SQL Server - Evagoras ...

Description:... we can define the identity field inside the CREATE ... is
that we cannot define a unique identifier inside the ... 2 Responses to
Identity fields in Oracle ...



5.Subject: Re: How to make a joint primary key of two or ...

Description:> > I can't figure out how to make two fields function as a
single primary key and thus > have an unique ... definition line. This ...
of two or more fields: ...



6.Unique key - Wikipedia, the free encyclopedia

Description:... and in fact such a column may contain at most one NULL
fields. ... 2 Defining unique keys; 3 Surrogate keys; 4 ... (You can
define a unique key on columns that ...



7.How to define relationships between tables in an Access ...

Description:09-08-2013 · ... key fields from the other two ... field or
fields that you want to define as ... key or has a unique index. The
related fields have ...



8.Field (mathematics) - Wikipedia, the free encyclopedia

Description:... is a field extension of degree 2. Algebraic number fields
are by definition finite field ... up to isomorphism the reals form the
unique complete ordered field.)



9.How to: Create a Custom List Definition

Description:To create the field definition. Start Microsoft Visual Studio
2010. On the File menu, point to New, and then click Project.



10.Creating Composite Keys Tutorial for MS Access | eHow

Description:How to Define a Composite Primary Key; ... Use primary keys in
Microsoft Access as unique fields within ... A composite key combines two
columns to make a unique ...