On Sat, Oct 5, 2013 at 3:24 PM, JORGE MALDONADO wrote:
> So, let´s say that I have the following simple example table:
>
> 1. cus_id
> 2. cus_name
> 3. Other fields . . .
>
> Where "cus_id" is the primary key. And let´s also say that I want "cus_name"
> to be unique. I have the option to create a
So, let´s say that I have the following simple example table:
1. cus_id
2. cus_name
3. Other fields . . .
Where "cus_id" is the primary key. And let´s also say that I want
"cus_name" to be unique. I have the option to create a unique constraint or
a unique index. What would be the best decision a
Steve Grey-2 wrote
> Unique indexes can be partial, i.e. defined with a where clause (that must
> be included in a query so that PostgreSQL knows to use that index) whereas
> unique constraints cannot.
This implies there can be data in the table but not in the index and thus
said index is not part
Unique indexes can be partial, i.e. defined with a where clause (that must
be included in a query so that PostgreSQL knows to use that index) whereas
unique constraints cannot.
JORGE MALDONADO wrote
> I have search for information about the difference between "unique index"
> and "unique constrain
JORGE MALDONADO wrote
> I have search for information about the difference between "unique index"
> and "unique constraint" in PostgreSQL without getting to a specific
> answer,
> so I kindly ask for an explanation that helps me clarify such concept.
A constraint says what valid data looks like.
On 10/04/2013 10:41 AM, luca...@gmail.com wrote:
Il 04/10/2013 18:48, JORGE MALDONADO ha scritto:
I have search for information about the difference between "unique
index" and "unique constraint" in PostgreSQL without getting to a
specific answer, so I kindly ask for an explanation that helps me
On 10/04/2013 09:48 AM, JORGE MALDONADO wrote:
I have search for information about the difference between "unique
index" and "unique constraint" in PostgreSQL without getting to a
specific answer, so I kindly ask for an explanation that helps me
clarify such concept.
The way I think of it is, t
Il 04/10/2013 18:48, JORGE MALDONADO ha scritto:
I have search for information about the difference between "unique
index" and "unique constraint" in PostgreSQL without getting to a
specific answer, so I kindly ask for an explanation that helps me
clarify such concept.
2 main differences.
Fi
I have search for information about the difference between "unique index"
and "unique constraint" in PostgreSQL without getting to a specific answer,
so I kindly ask for an explanation that helps me clarify such concept.
Respectfully,
Jorge Maldonado
