Comments on: SQL SERVER – Create Primary Key with Specific Name when Creating Table

By: SQL SERVER – Weekly Series – Memory Lane – #026 | SQL Server Journey with SQL Authority

Sat, 27 Apr 2013 01:31:32 +0000

[...] Create Primary Key with Specific Name when Creating Table Often primary keys are created with a default name and it is a good idea that we create primary keys with specific name so it helps readability and user can directly know lots of information if he/she is familiar with the naming convention. [...]

By: janu

janu — Fri, 08 Mar 2013 16:28:21 +0000

how to set primary key for email.id in my registeration form.pls give me example

By: madhivanan

madhivanan — Fri, 15 Feb 2013 12:59:04 +0000

You need to drop the contraint and then alter the datatype

By: ganesh

ganesh — Wed, 13 Feb 2013 14:16:48 +0000

i hav a table
CREATE TABLE Table1(
Col1 INT NOT NULL,
Col2 VARCHAR(100)
CONSTRAINT PK_Table1_Col1 PRIMARY KEY (Col1))
once table created i need to change id int to bigint how its possible

By: ganesh

ganesh — Wed, 13 Feb 2013 14:13:30 +0000

how to alter primary key column

By: SQL SERVER – Fix Error: 8111 – Cannot define PRIMARY KEY constraint on nullable column in table – Error: 1750 – Could not create constraint. See previous errors « SQL Server Journey with SQL Authority

Mon, 04 Feb 2013 01:30:30 +0000

[...] You can read about more about creating a Primary Key over here: SQL SERVER – Create Primary Key with Specific Name when Creating Table. [...]

By: edu

edu — Tue, 18 Dec 2012 22:10:19 +0000

sorry but I have a problem with a create. Could you help me?

the query is:

CREATE TABLE Restaurante
(
id INTEGER IDENTITY(1,1) PRIMARY KEY,
nombre VARCHAR(60) NOT NULL,
direccion VARCHAR(100) NOT NULL,
coord_X FLOAT,
coord_Y FLOAT,
puntuacion FLOAT
);

I think that it’s ok, but I have this mistake: ORA-00907: missing right parenthesis

How I can solve it?

thantk

By: madhivanan

madhivanan — Mon, 18 Jun 2012 08:21:24 +0000

Have you look at the CREATE table examples from SQL Server help file?

By: lekshmi

lekshmi — Wed, 13 Jun 2012 05:12:33 +0000

sir,
i am a b.tech student and i want know to know how to set the primary key and foregin key when creating a table for doing my database lab.i read all the statements here,but we are creating the table using the query-create table table name (name varchar(10),………………………);-this may be a simple query for u..but please help me to insert the keys while creating tables….reply me sir

By: SQL SERVER – Various Ways to Create Constraints – Quiz – Puzzle – 17 of 31 « SQL Server Journey with SQL Authority

Wed, 18 Jan 2012 01:31:42 +0000

[...] Prevent Constraint to Allow NULL Create Default Constraint Over Table Column Create Primary Key with Specific Name when Creating Table Creating Primary Key, Foreign Key and Default Constraint How to ALTER CONSTRAINT Disable CHECK [...]

By: SQL SERVER – Interview Questions and Answers – Frequently Asked Questions – Day 13 of 31 Journey to SQLAuthority

Wed, 13 Jul 2011 01:30:42 +0000

[...] (Read more here) [...]

By: Krishna

Krishna — Fri, 26 Nov 2010 02:40:32 +0000

Hi All,
I am new to SQL Server and is working on a test task to create a database with related tables.
I have two tables -
1. First table has the Plant Names with their locations and addresses.
2. Second table has the performance metrics recorded every month. This means that the second table has repeating Plant Name (every month), RefYear (also repeating values) and RefMonth (also repetitive). The only criteria that each row is different from another is that Plant Name, RefYear and RefMonth are not identical for any two rows.

Do I have to assign a Primary Key for the second table? The Plant Name can be a Foreign Key relating to the Primary Key of the first table? In Access, the second table has the additional column of Primary Key which is an Autonumber.
I can add an additional column in the second table in the same lines as Access, but it does not relate to anything in the second table or other tables (e.g. Prime Mover type, Fuel etc) which I propose to add later.
Can I leave the second table without a Primary Key? Is it a good design? What are the alternatives?
I’d appreciate for any suggestions.

By: Adam Plocher

Adam Plocher — Thu, 29 Apr 2010 06:30:41 +0000

Creating a foreign key is very similar.

Instead of:
constraint [PK_PersonID] primary key (PersonID)

Use:
constraint [FK_Person_PersonType] foreign key (PersonTypeID) references PersonType(PersonTypeID)

By: Deepak Sharma

Deepak Sharma — Fri, 23 Apr 2010 12:18:44 +0000

Dear Mr. Pinal,
I have a question which is not directly related with this topic, but there is some relationship with Primary key and Clustered Index. The question is:

I have a table “TestIndex”:

CREATE TABLE TestIndex
(
ID INT IDENTITY,
Name Nvarchar(100)
)
CREATE UNIQUE CLUSTERED INDEX MyIndex ON TestIndex(ID)

Now I run the following query:

SELECT * FROM sys.indexes WHERE object_id=object_id(‘TestIndex’)

It will give me the information of Indexes on the table “TestIndex”. Now I write the following query to Add a Primary Key Constraint on the table “TestIndex” on Column ID:

ALTER TABLE TestIndex
ADD CONSTRAINT MyKeyClustered PRIMARY KEY (ID)

Again When I run this quey:

SELECT * FROM sys.indexes WHERE object_id=object_id(‘TestIndex’)

It will create a NonClustered Index Named: MyKeyClustered, and
EXECUTE sp_help TestIndex
will give the information Primary key created on ID on NonClustered Index.
My question is this I don’t want to create a NonClustered Index on my Primary Key Constraint, but I want to use the Clustered Index “MyIndex” on Primary Key Constraint. How I can do it?
Please help.

By: SQL SERVER – Update Statistics are Sampled By Default Journey to SQL Authority with Pinal Dave

Fri, 23 Apr 2010 01:32:00 +0000

[...] 23, 2010 by pinaldave After reading my earlier post SQL SERVER – Create Primary Key with Specific Name when Creating Table on Statistics, I have received another question by a blog reader. The question is as [...]

By: Sajid

Sajid — Thu, 22 Apr 2010 10:36:28 +0000

Nutan,

Yes.. there is an option through SSMS as well.

In design mode, right click on Blank area, choose “Index/Keys” option from shortcut menus…Select the Index or Primary key in the list that you want to specify the name for… right side of the dialog you will see the option to set the name for it.

Once changed, close the dialog and save the changes… thats it.

Regards,
Sajid

By: Nutan

Nutan — Thu, 22 Apr 2010 09:40:07 +0000

Hi,

This is one of the new and interesting thing for me.

Again I do have one question. Is there any option to put custom name for constraint while creating a table from the design mode?

By: Anon

Anon — Thu, 22 Apr 2010 09:06:42 +0000

To the point and very accurate.

By: Joe Ramani

Joe Ramani — Thu, 22 Apr 2010 09:05:08 +0000

Something I was looking for today.

Thanks Dave

By: pinaldave

pinaldave — Thu, 22 Apr 2010 06:25:39 +0000

Hi JamWheel,

Very good question. I think book online and SSMS can do lots of things.

It is about knowing various details. Knowledge various from people to people.

This blog post is for those who do not know the details.

Again, this is just a my opinion.

Kind Regards,
Pinal

By: pinaldave

pinaldave — Thu, 22 Apr 2010 06:23:36 +0000

Hi Sajid,

The missed comma is added.

Appreciate your comment.

Kind Regards,
Pinal

By: JamWheel

JamWheel — Thu, 22 Apr 2010 06:19:46 +0000

If you script a table in SSMS with default scripting options it includes the script to create the PK as per your 2nd example above.

Is this really blog worthy?

By: Sajid

Sajid — Thu, 22 Apr 2010 04:03:20 +0000

Hi Pinal… with first look on your query to create the primary key with specific name, I smelled syntax problem (Even though I was certain that you must had tested the query before posting) as we always use to have comma (,) before CONSTRAINT Keyword.

Wondered that both works :) – check below query

CREATE TABLE [dbo].[TestTable1](
[ID] [int] IDENTITY(1,1) NOT NULL,
[FirstName] [varchar](100) NULL,
CONSTRAINT [PK_TestTable1] PRIMARY KEY CLUSTERED
([ID] ASC)
)

In case only one column is candidate for primary key there is another way to have constraint with name in Create table statement (as below)…

CREATE TABLE [dbo].[TestTable2](
[ID] [int] IDENTITY(1,1) NOT NULL CONSTRAINT [PK_TestTable2] PRIMARY KEY CLUSTERED,
[FirstName] [varchar](100) NULL
)

Just to have all possibilities together.

Regards,
Sajid

By: pinaldave

pinaldave — Thu, 22 Apr 2010 01:58:55 +0000

Thank You Noel

For additional link to book online.

Kind Regards,
Pinal

By: Noel

Noel — Thu, 22 Apr 2010 01:46:17 +0000

Did you tell the reader that this is in Books Online?

http://technet.microsoft.com/en-us/library/ms174979.aspx

Example “F” even has a CREATE TABLE example where the primary key is named.