How To Tell SQL Server To Use The Default Constraint Name When Adding One?
Oct 26, 2005
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
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.
IF 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,I see the following in Books Online: CONSTRAINT--Is an optional keywordindicating the beginning of a PRIMARY KEY, NOT NULL, UNIQUE, FOREIGNKEY, 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
I have created a SQL view of several tables, and need to add either a primary key or a constraint to this view. I need it for some full text indexing that will be performed on the view. How do I do it?
alter table tblV add constraint foreign key (T_ID) references tblT(T_ID) on delete set null on update cascade Error is: Major Error 0x80040E14, Minor Error 25501 There was an error parsing the query. [ Token line number = 3,Token line offset = 1,Token in error = foreign ]
I'm new with SQL Mobile, so sorry for the novice question.
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
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?
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
Select MemberNbr, EligYear,EligMonth, count(*) FROM [MemberMonth] GROUP BY MemberNbr, EligYear,EligMonth HAVING COUNT(*) > 1
THIS WILL GIVE ME ZERO ROWS,,, That is GOOD which means NO DUPLICATES..I need to add a constraint to the table MEMBERMONTH to make sure no one can insert duplicate records.
I am trying to alter a table adding a column with foreignkey constraint. The table that holds the primary key in that relation has data, so i am not being able to execute the alter statement.
This is the error:
Server: Msg 547, Level 16, State 1, Line 1 ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'FK_MOPAeroportoICAO_IDMOPAlimentacaoFerroviaTipo'. The conflict occurred in database 'MOP', table 'MOPAlimentacaoFerroviaTipo', column 'IDMOPAlimentacaoFerroviaTipo'.
This is the script:
ALTER TABLE MOPAeroportoICAO ADD IDMOPAlimentacaoFerroviaTipo [int] DEFAULT 0 NOT NULL CONSTRAINT [FK_MOPAeroportoICAO_IDMOPAlimentacaoFerroviaTipo] FOREIGN KEY REFERENCES MOPAlimentacaoFerroviaTipo (IDMOPAlimentacaoFerroviaTipo)
How can i turn of check when i add the foreign key ?
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.
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
ALTER TABLE [dbo].[bkrm_lendcoll] ADD CONSTRAINT    ReqdCovgAmt_constraint33 CHECK    ( case  when CovgAmt = 0 and  ReqdCovgAmt = 0 then 1  when CovgAmt = 0 and  ReqdCovgAmt = 1 then 1  when CovgAmt = 1 and  ReqdCovgAmt = 0 then 1  when CovgAmt = 1 and  ReqdCovgAmt = 1 then 0 end =1 )
This is my first attempt to add a constraint for business logic. Â The desired behavior is that the two columns together have the same behavior as a radio button. Â (one can be true, the other true, both can be false, but both cannot be true.) I get this error when I attempt to update it.
The ALTER TABLE statement conflicted with the CHECK constraint "ReqdCovgAmt_constraint33". The conflict occurred in database "Std", table "dbo.lendcoll".
So, basically my question is, when you have two bit columns and want them to have the truth table such as described, how can I set a Check constraint to enforce this?
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.....
 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?
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
I'm new to SQL server and am in the process of converting an Access Db to SQL.
What I'd like to happen is for the current date and an Autonumber generated as soon as the user enters a value in another field. This was fairly straightforward in Access. When I try to set the default in design table (inSQL), the date() is not available. After a little research I came up with CREATE DEFAULT and Bind column commands, Global variables, etc.
I have a couple of questions for anyone that might know:
Is there an easier way than this to create default values in a table? AND,
Would I also have to bind columns for Table lookups? For example, if I wanted a price to be returned after the product ID was entered (Automatic in Access if relationship/form setup properly), would I have to bind the column? Or would it happen automatically?
HiI have a table that currently has 466 columns and about 700,000records. Adding a new DEFAULT column to this table takes a long time.It it a lot faster to recreate the table with the new columns and thencopy all of the data across.As far as I am aware when you add a DEFAULT column the followinghappens:a) The column is added with a NULL propertyb) Each row is updated to be set to the DEFAULT valuec) The column is changed to NOT NULL.However, adding the column as NOT NULL with the DEFAULT seems to take alot longer than if I do steps a) - c) separately.When I say a long time, adding just a single DEFAULT column takesaround 6 hours. Surely it should not take this long?There is a trigger on this table but disabling this does not seem tomake much difference.Can anybody give me any advice on the use of DEFAULT columns please?When should they be used, benefits, disadvantages, alternatives etc.Also should it really take as long as it is taking or is there aproblem with my setup?If I am honest I can't see why DEFAULT columns should be used as thevalues could always be inserted explicitly via the applicationThanks in Advance.Paul
I have this querey at the minute but when I attempt to put the default value of IND in the Sales Rep Code field I get an error Invalid column name, if I try and put 'IND' AS [Sales Rep Code] I get an incorrect syntax error.
DECLARE @Query nVarchar(1000) SET @Query = N'SELECT NULL AS [GEO UNIT], NULL AS [PMC Invoice Date], IND AS [Sales Rep Code] FROM '+ 'Test' + RIGHT(DATEPART(yy, GETDATE()), 2) + '_' + CASE WHEN DATEPART(m, GETDATE()) IN ('11', '12', '1') THEN 'Q1' ELSE CASE WHEN DATEPART(m, GETDATE()) IN ('2', '3', '4') THEN 'Q2' ELSE CASE WHEN DATEPART(m, GETDATE()) IN ('5', '6', '7') THEN 'Q3' ELSE CASE WHEN DATEPART(m, GETDATE()) IN ('8', '9', '10') THEN 'Q4' END END END END + '.dbo.all_data' EXECUTE sp_executesql @Query, N'@level tinyint', @level = 35
How can I give default value to a field in a table which is already created, i.e. there is a table test and it have field test1 which is int(4). Now, I want to give a default value 0 to this field. As I am not able to access Enterprise Manager, I want to do it using Query Analyzer. How can I do this using Query Analyzer?
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?
In my Projecti want to check the date at the time of insert in A-Tablethat it should be Greater than (>) Date Defined in B-TableNote:-B-table have only one record so plz tell me how can i do using Sql-Server Backend only
SQL CE 3.0 I am trying to add constraints using SQL statements but get an error saying that the constraint would cause a cyclical reference. The same statements work with SSCE 2.0
I want to set up a simple check constraint on a column limiting to values "Yes", "No" and ""I'm trying to use:CONSTRAINT IsAccessToItRestricted_ckcheck (IsAccessToItRestricted in('Yes,'No','');but this is not the right syntax.............. help!
