MS SQL Server :: How To Create A Constraint Like This:

Can't Create Unique Constraint

Nov 3, 2000

I am attempting to create a unique constraint on an nvarchar field named theology (it is not the primary key field)
that allows nulls. The table contains multiple rows with the value of null for
field theology. The documentation says one can create a unique constraint on a
field with all unique value except for null. Here is the error message:

'testtable1' table
- Unable to create index 'IX_testtable1'.
ODBC error: [Microsoft][ODBC SQL Server Driver][SQL Server]CREATE UNIQUE INDEX
terminated because a duplicate key was found. Most significant primary key
is ''.
[Microsoft][ODBC SQL Server Driver][SQL Server]Could not create constraint. See
previous errors.

Any ideas? I am creating a unique constraint and not a unique index. Is there
some other database option to set to allow this?

.

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Create CHECK Constraint

Mar 23, 2014

I need to create a check constraint for an email column/field, where the field must contain an "@" symbol. Does sql (oracle or SQL in general) let you do this.

1. Tried myself:
ALTER TABLE Q_Customer
ADD CONSTRAINT Q_chk_Cus_email CHECK (Cus_email LIKE '%@%');

...but
ORA-02293: cannot validate (C3267304.Q_CHK_CUS_EMAIL) - check constraint violated

2. Tried from a forum: alter table Q_CUSTOMER
add constraint Q_Chk_cus_email check (Cus_email like '%_@__%.__%')

...but
ORA-02293: cannot validate (C3267304.Q_CHK_CUS_EMAIL) - check constraint violated

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Create Constraint Error

May 16, 2007

Hi.I have a procedure with this in it (there are no other references toasset_number_bak_tmp_pk in the procedure and it calls nothing else written byme, just system calls or normal dml).create table #asset_bak(asset_number varchar(60) not null,asset_desc varchar(100) null,location varchar(40) null,constraint asset_number_bak_tmp_pk primary key clustered (asset_number))When I run the procedure, I get this message:(1 row(s) affected)Msg 2714, Level 16, State 4, Procedure updatenavharrierdb, Line 19There is already an object named 'asset_number_bak_tmp_pk' in the database.Msg 1750, Level 16, State 0, Procedure updatenavharrierdb, Line 19Could not create constraint. See previous errors.How can I find where else the system thinks this constraint exists?I tried this but it only finds it in one place (one row in the result set),i.e. my procedure:select sysobjects.name, syscomments.textfrom sysobjects, syscommentswhere sysobjects.id = syscomments.id and((lower(sysobjects.name) like '%asset_number_bak_tmp_pk%') or(lower(syscomments.text) like '%asset_number_bak_tmp_pk%'))Is this somehow a case where I need to do something dynamically, or purge someinformation? I thought temp tables and their crony constraints disappearedafter the procedure exited.thanksJeff Kish

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Create A Foreign Key To Unique Constraint?

Jul 3, 2015

why it is not possible to create a Foreign key to a Unique constraint?

Table A has column 1 holding a Primay key and two columns (2 and 3) holding a Unique combination (and some more columns).He created an Unique constraint on column 2 and 3 together.

He wanted to use this Unique combination to point to table B (instead of the table 1's PK) so he tried to create a foreign key on a column in table B but an error popped up prompting;

The columns in table 'TABLE_A' do not match an existing primary key or UNIQUE constraint.

Ok - these two columns ar no PK but the hold an Unique constraint......

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Create Constraint To Add Only Alphabet In Column

Aug 21, 2006

I need to create constraint in column to add only alphabet .

like "adc" ,"sdfsd" and not "1234adfd".plz reply soon.

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SQL 2012 :: How To Create Check Constraint On A View

Mar 12, 2015

I want to create a check constraint on a table but the constraint values depend upon another table column as well, now one possible way is to create a function to check the column value. But I don’t want to use the function.

Can I do this in a view if so then how can I achieve this.

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Replication :: Not Create New Constraint Range For Subscriber

Jul 14, 2015

I have a merge replication in place. I increased the identity_range to 100000 for a table. I have done this both ways, via the properties of the publication on SSMS, and via TSQL. I have call sp_adjustpublisheridentityrange. Then I recreated the sanpshot. EXEC sp_adjustpublisheridentityrange @table_name = N'Label', @table_owner = N'caseup';but after synchronization, the range defined in the table's constraint has not changed and now all of the identity values are used up. All inserts are failing.What needs to be done to force the publisher to recreate the identity range on a subscriber(s).

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How To Create A Unique Constraint On Composite Columns

May 5, 2008

I am trying to create a Unique Constraint on a SQL Server 2005 table where the uniqueness is based on 2 columns.

Could anybody provided some help on how I could enforce this on an existing table (link, or example) I have been looking around without luck.

Thanks in advance

John.

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How To Create A Constraint On A Header And Detail Tables?

Feb 5, 2008

Hello,

I have a header and detail table. I want to create a constraint on the detail table, based on a value it's linked to in the header table. If the bit is checked in header then a unique value is required , if it's not checked then a NULL value is acceptable.

Many thanks in advance.

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Unable To Create Unique Constraint On A NULL Column

Apr 5, 2004

Hi all,

I am trying to add a unique index/constraint on a column that allows NULL values. The column does have NULL values and when I try to create a unique constraint, I get the following error.

CREATE UNIQUE INDEX terminated because a duplicate key was found for index ID 9. Most significant primary key is '<NULL>'.

Are'nt you allowed to create a UNIQUE constraint on a NULL column? Books Online says that you are allowed to create a unique constraint on NULL columns, then why am I getting this error.

Any help would be appreciated.
Thanks,
Amir

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SQL 2012 :: Create A Check Constraint Where Another Table Column Value Is Also Involved

Mar 12, 2015

Table ATable B
AIDBID
Col 1BCol1
Col 2
Col3

I want to put a check constraint on A.col3 that depends on the values of A.Col1, A.Col2 and B.BCol1

How can I achieve this without using function.

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Named Constraint Is Not Supported For This Type Of Constraint (not Null)

May 13, 2008

Hi, all.

I am trying to create table with following SQL script:

Code Snippet

create table Projects(
ID smallint identity (0, 1) constraint PK_Projects primary key,
Name nvarchar (255) constraint NN_Prj_Name not null,
Creator nvarchar (255),
CreateDate datetime
);

When I execute this script I get following error message:

Error source: SQL Server Compact ADO.NET Data Provider
Error message: Named Constraint is not supported for this type of constraint. [ Constraint Name = NN_Prj_Name ]

I looked in the SQL Server Books Online and saw following:

CREATE TABLE (SQL Server Compact)
...
< column_constraint > ::= [ CONSTRAINT constraint_name ] { [ NULL | NOT NULL ] | [ PRIMARY KEY | UNIQUE ] | REFERENCES ref_table [ ( ref_column ) ] [ ON DELETE { CASCADE | NO ACTION } ] [ ON UPDATE { CASCADE | NO ACTION } ]

As I understand according to documentation named constraints should be supported, however error message says opposite. I can rephrase SQL script by removing named constraint.

Code Snippet

create table Projects(
ID smallint identity (0, 1) constraint PK_Projects primary key,
Name nvarchar (255) not null,
Creator nvarchar (255),
CreateDate datetime
);
This script executes correctly, however I want named constraints and this does not satisfy me.

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Unique Constraint Error When There Is No Constraint

May 13, 2008

We are using SQL CE 3.5 on tablet PCs, that synchs with our host SQL 2005 Server using Microsoft Synchronization Services. On the tablets, when inserting a record, we get the following error:
A duplicate value cannot be inserted into a unique index. [ Table name = refRegTitle,Constraint name = PK_refRegTitle
But the only PK on this table is RegTitleID.

The table structure is:
[RegTitleID] [int] IDENTITY(1,1) NOT NULL,
[RegTitleNumber] [int] NOT NULL,
[RegTitleDescription] [varchar](200) NOT NULL,
[FacilityTypeID] [int] NOT NULL,
[Active] [bit] NOT NULL,

The problem occurs when a Title Number is inserted and a record with that number already exists. There is no unique constraint on Title Number.
Has anyone else experienced this?

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Aug 4, 2004

Hi All,

I'm trying to create a proc for granting permission for developer, but I tried many times, still couldn't get successful, someone can help me? The original statement is:

Create PROC dbo.GrantPermission
@user1 varchar(50)

as

Grant create table to @user1
go

Grant create view to @user1
go

Grant create Procedure to @user1
Go

Thanks Guys.

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May 20, 2008

the subject pretty much says it all, I want to be able to do the following in in VB.net code):

{[If [table with this name] already exists [in this sql database] then [ don't create another one] else [create it and populate it with these values]}

How would I do this?

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Mar 3, 2014

I created a cursor that moves through a table to retrieve a user's name.When I open this cursor, I create a variable to store the fetched name to use within the BEGIN/END statements to create a login, user, and role.

I'm getting an 'incorrect syntax' error at the variable. For example ..

CREATE LOGIN @NAME WITH PASSWORD 'password'

I've done a bit of research online and found that you cannot use variables to create logins and the like. One person suggested a stored procedure or dynamic SQL, whereas another pointed out that you shouldn't use a stored procedure and dynamic SQL is best.

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Jul 20, 2005

Can I dynamically (from a stored procedure) generatea create table script of all tables in a given database (with defaults etc)a create view script of all viewsa create function script of all functionsa create index script of all indexes.(The result will be 4 scripts)Arno de Jong,The Netherlands.

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Help-Constraint

May 29, 2001

Hi,
I am trying to figure out how to do this.
For each row, only one out of two columns(id1,id2) should be populated. So if the id1 column is already populated and the application tries to fill in something for id2 then we just simply don't want to allow that and vice versa.

I am thinking triggers is the way to go. What do you think?
thanks
Rozina

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Sep 21, 2000

using alter table syntax how can i insert the field TramingChoiceCd
Extend the constraint on NetwkChannel table UQ__TetwkChannel__50FB042B to include TramingChoiceCd

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Nov 30, 2001

Which is the preferred method Rule, Check Constraint or Trigger?
I want to set a column to todays date when the column is = "T"
else when "F" set it to a future date. Each time there is a insertion into
the table.

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Jun 7, 2004

I have a varchar field in a table.I want to restrict the entries in that field as "yes" or "no" nothing else.No record will be allowed for this field without yes or no.My question is is it possible without using any trigger for the table?I want to do it with the help of a constraint.

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Oct 13, 2004

When I see desing table option in enterprise manager of a table I don't see any constraints, but when I extract ddl I can see all 6 of them. They are all unique constraints not the check constraints. Is this normal. I am new to SQL Server and would appreciate some explanation.

Thanks

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Nov 15, 2007

Hi, i want to put a contraint on a table which much check agains two values in the same column for the same member.

For example, i don't want a male to get information based on breast cancer, and i don't want a female to get information based on prostate cancer.

I have included some sample data. Just copy and paste.

Code Block

DECLARE @MemberLookupValues TABLE (OptionID INT, ValueID INT, Description VARCHAR(20))
INSERT @MemberLookupValues VALUES (3, 10, 'Male')
INSERT @MemberLookupValues VALUES (3, 11, 'Female')
INSERT @MemberLookupValues VALUES (7, 69, 'Prostate Cancer')
INSERT @MemberLookupValues VALUES (7, 70, 'Breast Cancer')

DECLARE @MemberValues TABLE (MemberID INT, OptionID INT, ValueID INT)
INSERT @MemberValues VALUES (1, 3, 10)
INSERT @MemberValues VALUES (1, 7, 69)
INSERT @MemberValues VALUES (1, 7, 70)
INSERT @MemberValues VALUES (2, 3, 11)
INSERT @MemberValues VALUES (2, 7, 69)

SELECT * FROM @MemberLookupValues
SELECT * FROM @MemberValues

I've highlighted the values that must be stopped.

So the basic check would be, IF OptionID = 3 AND ValueID = 10 then it must not allow you to insert the values OptionID = 7 AND ValueID = 70

I hope that makes sense.

Any help will be greatly appreciated, if you need any more informaiton then just ask,

Kind Regards
Carel Greaves

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Can CREATE DATABASE Or CREATE TABLE Be Wrapped In Transactions?

Jul 20, 2005

I have some code that dynamically creates a database (name is @FullName) andthen creates a table within that database. Is it possible to wrap thesethings into a transaction such that if any one of the following fails, thedatabase "creation" is rolledback. Otherwise, I would try deleting on errordetection, but it could get messy.IF @Error = 0BEGINSET @ExecString = 'CREATE DATABASE ' + @FullNameEXEC sp_executesql @ExecStringSET @Error = @@ErrorENDIF @Error = 0BEGINSET @ExecString = 'CREATE TABLE ' + @FullName + '.[dbo].[Image] ( [ID][int] IDENTITY (1, 1) NOT NULL, [Blob] [image] NULL , [DateAdded] [datetime]NULL ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]'EXEC sp_executesql @ExecStringSET @Error = @@ErrorENDIF @Error = 0BEGINSET @ExecString = 'ALTER TABLE ' + @FullName + '.[dbo].[Image] WITHNOCHECK ADD CONSTRAINT [PK_Image] PRIMARY KEY CLUSTERED ( [ID] ) ON[PRIMARY]'EXEC sp_executesql @ExecStringSET @Error = @@ErrorEND

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Mar 26, 2008

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I've tried searching for anything but haven't had any luck as of yet. I guess I don't even know where to start or what to look for.

Any help would be appreciated. Thanks!

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Mar 28, 2007

Hi I was wodering how to add an OR statment right in the Check Constraint expression.
This is what I am starting with in the database
([zip] like '[0-9][0-9][0-9][0-9][0-9]')
and what I want well not exact but this would answer my question
([zip] like '[0-9][0-9][0-9][0-9][0-9] || [A-Z][A-Z][A-Z][A-Z][A-Z]')
Thanks for any help

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Is it possible to set an index of no duplicates on a column other than the primary key of a table? If yes, how is this done?

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Jan 3, 2005

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May 13, 2006

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Oct 31, 2000

hi, I want to implement a constraint on a talbe for two fields
phone numbers should b (###)###-####
and ss# should be ###-##-####

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Thanks
Ahmed

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Aug 11, 1999

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enrollment --- lessonhistory is 1-to -many, ssn, courseid and lessonid is pk in lessonhistory . I tried to set FK_SSN foreign key constraint in lessonhistory table reference enrollment table, it always show error message " no primary key in referewnce talbe enrollment "
I don't know how to fix it. could you help me out, thanks!!

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Dec 7, 2003

Can somebody tell me about on delete constraint and where should it be used - table having foriegn key?

coz want i want is- the moment i delete the data from the table whose primary key is been referenced as foreign key , The Data in all the tables where its primary key is beeen used as forein key should be deleted.

:confused:

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