Hi,
I see the following in Books Online: CONSTRAINT--Is an optional keyword
indicating the beginning of a PRIMARY KEY, NOT NULL, UNIQUE, FOREIGN
KEY, or CHECK constraint definition...
But I have a table column defined as follows:
[MONTH] [decimal] (2, 0) NOT NULL CONSTRAINT
[DF__TBLNAME__MONTH__216361A7] DEFAULT (0)
My question: Is "DEFAULT" a constraint, or is it called something else?
Thanks,
Eric
Hi,
I need list out the defaulat and constraint value in SQL2K. Where I get those values.
Thanks,
Ravi
A few weeks ago a client asked me to add a column to a table so Icreated this script:ALTER TABLE dbo.tblIndividual ADD fldRenewalStatus BIT NOT NULLCONSTRAINT fldRenewalStatus_Default DEFAULT 0Now they want to change it from a BIT to an INT, to store an enum.Fair enough. However, no matter how much I wrangle with a script, Ican't find a reliable way to alter the column. I've mixed and matchedthe following and nothing seems to work:EXEC sp_unbindefault 'tblIndividual.fldRenewalStatus'DROP DEFAULT DF_tblIndividual_fldRenewalStatusALTER TABLE tblIndividualDROP CONSTRAINT fldRenewalStatus_DefaultALTER TABLE tblIndividualDROP COLUMN fldRenewalStatusGOALTER TABLE tblIndividualADD fldRenewalStatus int NOT NULLCONSTRAINT fldRenewalStatus_Default DEFAULT 0Thoughts?ThanksEdward
View 4 Replies View RelatedHello,
I have a table set up called tbl_DailySummary_new. In that table I have a column called €˜RevType€™ char(2) NOT NULL Default €˜00€™. I'm trying to populate this table from another table called tbl_DailySummary. The RevType column in tbl_DailySummary allows null values (and has them). When I attempt to insert all records from tbl_dailysummary into tbl_DailySummary_new, I get the following error message:
Msg 515, Level 16, State 2, Line 1
Cannot insert the value NULL into column 'RevType', table 'TxnRptg.dbo.tbl_DailySummary_new'; column does not allow nulls. INSERT fails.
The statement has been terminated.
Why dosen€™t the default constraint on the RevType column in the new table pick this up?
Thank you for your help!
cdun2
Hi ,
I want to define default constraint for a column to force it to UPPER.
USE [GLP]
GO
ALTER TABLE [dbo].[col1] ADD CONSTRAINT [DF_col1_TypeCode] DEFAULT (N'UPPER(col1)') FOR [col1]. Its defined..
But when I tried ti insert into records..It not convertedto uppecase at all...Isn't it possible this way ?
Thanks,
-V
Troops,
I'm a software developer trying to hack my way thru a SQL script to increase the size of a column. The column has a constraint on it that won't allow the alter unless its dropped.
Alter command:
ALTER TABLE dbo.QueueBack ALTER Column QBQueue varchar(4) NOT NULL
Message response:
Msg 5074, Level 16, State 1, Line 10
The object 'DF__QueueBack__QBQue__76818E95' is dependent on column 'QBQueue'.
Msg 4922, Level 16, State 9, Line 10
ALTER TABLE ALTER COLUMN QBQueue failed because one or more objects access this column.
So, my script drops the default constraint, alters the column size and then adds the constraint back. The problem is that the constraint does NOT appear to be the same as it was prior. I can run the Alter command on the column and it will allow me to change the size of the column... where it prohibited me from doing such before. How do I restore the default constraint so it is exactly the way it was before I dropped it?
Thx,
Stretch
---------------------------------
Script for drop, alter, add... modified slightly for simplicity...
declare @Error int
BEGIN TRAN
SELECT @Error = 0
DECLARE @defname VARCHAR(100), @cmd VARCHAR(1000)
-- this is retrieved at run time from the sysconstraints table; hard-coded here...
set @defname = 'DF__QueueBack__QBCategory'
IF @defname <> ''
BEGIN
SET @cmd = 'ALTER TABLE dbo.QueueBack DROP CONSTRAINT '+ @defname
EXEC(@cmd)
if @@ERROR = -1
BEGIN
SET @Error = -1
END
END
if @Error = 0
BEGIN
-- modify the column
ALTER TABLE dbo.QueueBack ALTER Column QBCategory varchar(7) NOT NULL
if @@ERROR = -1
BEGIN
SET @Error = -1
END
END
if @Error = 0
BEGIN
-- Add the default constraint back
SET @cmd = 'ALTER TABLE dbo.QueueBack ADD CONSTRAINT '+ @defname + ' DEFAULT ('''') FOR QBCategory'
EXEC(@cmd)
if @@ERROR = -1
BEGIN
SET @Error = -1
END
END
if @Error = 0
BEGIN
-- Commit if no error...
COMMIT TRAN
END
ELSE
BEGIN
-- Rollback if error...
ROLLBACK TRAN
END
GO
Okay, maybe I'm getting ahead of myself.
Using SQL Server Express, VWD and .net 2.0 I've figured out how to drop a Table Column Constraint or Default Value/Binding and then Create it again using a stored procedure. What I can't figure out is how to retrieve that column's constraint value and write it to, say a label, in an aspx page, simply for reference. Is it possible? In this case the Data Type of the column is money.
I'm using it to perform a calculation to a column with a value that the user inserts into another column. (Column1(user input) minus Column2(with Default Value) = Column3(Difference). I just want to read Column2's Default Value for reference so I know whether to change it or not.
I can't seem to get the syntax correct for ALTERing an existing column with a default constraint. I've been to Help and BOL. There are examples that show how to use the ALTER command to add a column with a default constraint but not how to do it on an existing column.
Any help would be appreciated.
Sidney Ives
Hi guys,
I have this problem. I want to add a new primary key to a table but i want the name of the contstraint to be generated by the system. I have this TSQL code.
ALTER TABLE TableTest
ADD CONSTRAINT PRIMARY KEY (C1)
Reading the BOL, it says that if you don't supply a name for the constraint it generates one. But I get this error "Incorrect syntax near the keyword 'PRIMARY'".
If I add a name to the constraint, it works fine.
I'm using SQL Server 2000
Thanks
Darkneon
I have two fields CourseID and Erpid in table.
CourseID has identity property with integer datatype.
I need to add a default value for Erpid column which will show a value like 'A' + CourseID column. Erpid is Varchar column.
How can I use Convert function in default constraint?
Thanks!
I have a default constratint on DateColumn getdate()-1
I have used enterprise manager to update it to yesterday's date everyday.
I would like to have a SQL which can check for the date in the system
or even a trigger which checks when the date changes the constraint is updated itself. If this is not possible I would like to have a stored procedure which I will schedule to run as a job everyday once.
So if today 6/12/2006, the default value in the Datecolumn should be
6/11/2006.
This gives me a error, i tried but could not fix the bug.
Alter Table TABLE_NAME
Alter Constraint DF_DATECOLUMN
Default getdate()-1
Ashley Rhodes
I cannot figure out how to add a default constraint to an existing column. The syntax I'm using is :
ALTER TABLE table_name WITH NOCHECK
ADD CONSTRAINT column_name DEFAULT (0)
This gives me a syntax error.
The column was originally added with a default constraint of 1 to a 2.6 million row table.
I dropped the existing constraint and need to add the new default constraint of 0 for that column.
Anyone have any ideas? Thanks in advance.
I need to alter the datatype of a column from smallint to decimal (14,2) but the column was originally created with the following:
alter my_table
add col_1 smallintNot Null
constraint df_my_table__col_1 default 0
go
I want to keep the default constraint, but i get errors when I try to do the following to alter the datatype:
alter table my_table
alter column col_1 decimal(14,2)Not Null
go
Do I need to drop the constraint before I alter the column and then rebuild the constraint? An example would be helpful.
Thx
What are the tables are having the Default Constraint those table's Script the User can't generate but remaining tables He/She can generate,If i want DENY he/she to do not generate the script those are not having the DF Constraints what should i do.....
View 1 Replies View Related I have a table named [New Item] and created a default constraint on a column, and i wanted to change the data type of the column using the query
alter table [new item]
alter column pcs_qty decimal(15,2) not null
but the name of the default constraint is 'DF__New Item__Pcs_Qt__2D12A970' and i am not able to delete the constraint because it contains a space in between.Is there any work around for this.
I tried to delete the constraint by using the query
alter table [new item]
drop constraint 'DF__New Item__Pcs_Qt__2D12A970'
but I am getting the exception,
Msg 102, Level 15, State 1, Line 2
Incorrect syntax near 'DF__New Item__Pcs_Qt__2D12A970'.
Are there any vices to using default constraints on all columns in your table.
For example an Int that defaults to 0
or a char or varchar that defaults to ''
I know that 0 and Null are not the same thing. But if your programs don't have the concept of NULL then you have to convert the NULL to zero.
So, DEFAULT CONSTRAINTS on every column. Is it good or Bad?
Thanks
Darin Clark
I have several default constraints defined on a table. When I use theObject Browser and expand the constraints for this table andright-click and then select "Script Object to New Window As Create", acreate constraint statement for a different default constraint isdisplayed than the one I just right-clicked on. For example, I clickon constraint "DF_C" and it shows me "DF_B".The last time I encountered this, the solution was to dump contents ofthe table into another, drop, recreate it, and restore the contents.That's not a good option this time.Is there another way to fised this or at least navigate the catalog tofind out what is "off" about this?Thanks
View 1 Replies View RelatedIF NOT EXISTS (SELECT TOP 1 1 FROM dbo.syscolumns WHERE id = OBJECT_ID(N'dbo.Employee) and name = 'DoNotCall')
BEGIN
ALTER TABLE [dbo].[Employee] ADD [DoNotCall] bit not null Constraint DoNot_Call_Default DEFAULT 0
IF ( @@ERROR <> 0 )
GOTO QuitWithRollback
END
It just takes a LOT of time in SQL Server Management studio. I have to cancel the query and cancelling takes a whole lot time. I am using SQL Server 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.
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?
@pvColumnName  VARCHAR(100) = Default,  
However, I am unable to determine what is the value for Default. Is it '' ?
Default is not permitted as a constant - below fails to parse:
WHERE t2.TABLE_TYPE = 'BASE TABLE'
AND (@pvColumnName = Default OR t1.[COLUMN_NAME] Like @vColumnName)
Hi,
Does anyone have a workaround or know of a fix to this problem:
Default value set to 'date pick' from date currently within field by setting value equal to that field . ie if date is 01/01/2010 date picker opens in Jan 2010 - works ok.
However, once published to Sharepoint and run through browser the Date Picker ignores the default value and the date picker opens for today. ie April 2008.
Any words of wisdom gratefully recieved,
Howard Stiles
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
using alter table syntax how can i insert the field TramingChoiceCd
Extend the constraint on NetwkChannel table UQ__TetwkChannel__50FB042B to include TramingChoiceCd
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.
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.
View 1 Replies View RelatedWhen 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
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
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
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?
View 2 Replies View Relatedhow can i implement delete constraint? i mean i don't want the rows of the primary key table to be deleted if they are used as foreign key in some other table. so i want to check if that PK is used as foreign key in other tables before deleting.
View 10 Replies View RelatedHi,I want to add unique contraint to EXISTING column in EXISTING table.I have ms sql 2005.How to do that?
View 7 Replies View Relatedhi, I want to implement a constraint on a talbe for two fields
phone numbers should b (###)###-####
and ss# should be ###-##-####
How can I create such constraint. I tried, but got an error message and could not save the table with the new changes.
Thanks
Ahmed