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
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 stored procedure that adds constraints from a variable: ALTER procedure [dbo].[addMyConst](@txtAuto_ourlim money OUTPUT,@txtGen_ourlim money OUTPUT)ASEXECUTE('ALTER TABLE [dbo].[tbl1] ADD CONSTRAINT DF_auto_ourlim DEFAULT ' + @txtAuto_ourlim + ' FOR Auto_ourlim')EXECUTE('ALTER TABLE [dbo].[tbl1] ADD CONSTRAINT DF_Gen_ourlim DEFAULT ' + @txtGen_ourlim + ' FOR Gen_ourlim') This works fine unless one of the variables is null or empty. Then I get the error: "Incorrect syntax near the keyword 'FOR' Evidendly SQL Server Express sees "....DEFAULT + + FOR..." but I don't know. I've fiddled with this a long time and haven't a clue how to fix it. Any help would be appreciated. Thanks, Steve
There is a table exists in a database name tbDatabaseProviders.
I want to alter this table to add a column DatabaseProvider Also I want to add a default constraint so if nothing than 1 should be added. Â
Remember, the table already exists so when I write the script query then I want to first check the constraint if it exists then I dont want to add the constrait otherwise I will add it. Â
I was having problem to first add a constraint with the constraint name so I could find the constraint before finding it if it already exists.Â
I need to run the alter table to drop a default. However, the default name is kind of 'dynamic' from around 1000 databases, thus I need to run the following sql to get the name to a variable. Now, it looks the alter table statement does not like to drop a vaiable, is there a solution about it?
declare @radius_default varchar(40) select @radius_default = (select sobj.name from sysobjects sobj inner join syscolumns scolumn on sobj.ID = scolumn.cdefault where scolumn.name = 'radius' and sobj.name like '%LandMarks%') print 'Need To Drop @radius_default: ' + @radius_default --==================================== alter table LandMarks drop constraint @radius_default
Hi.I'm getting errors like this when I try to run an upgrade script I'm trying towrite/test:altering labels to length 60Server: Msg 5074, Level 16, State 4, Line 5The object 'ALTPART_ANNOT_ANNOTID_FK' is dependent on column 'label'.I used this to bracket my script:sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"gosp_msforeachtable "ALTER TABLE ? DISABLE TRIGGER all"go/* updates here */sp_msforeachtable @command1="print '?'",@command2="ALTER TABLE ? CHECK CONSTRAINT all"gosp_msforeachtable @command1="print '?'",@command2="ALTER TABLE ? ENABLE TRIGGER all"goI guess the alter table nocheck constraint isn't disabling the fk'scompletely?Is there a way around this, or do I manually have to do the constraintdropping/recreating?ThanksJeff Kish
/* for the google index */ALTER TABLEDEFAULT COLUMNDEFAULT VALUEI've worked out several stored procedures for altering the default columnvalues in a table. They were compiled from books and code snippets foundhere. It was a pain to work out so I've decided to share my work andresearch here. This post is just my way of saying thanks to several othershere for posting with their wisdom and intelligence.MichaelsimpsonAT(dot)cts(dot)comThis procedure gets the constraint name. If you use the design view tosetup a default value, you won't know the system assigned constraint name.This proc makes it an non issue. This code was gleened from this newsgroup.CREATE PROCEDURE [DBO].[GetConstraintName](@tablename sysname,@columnName sysname,@constraintName sysname OUTPUT)asSELECT@constraintName = o1.nameFROMsysobjects o1INNER JOINsyscolumns c ON o1.id = c.cdefaultINNER JOINsysobjects o2 ON o1.parent_obj = o2.idWHERE (o2.name = @tablename) AND (c.name = @columnName)This procedure changes the default value for a column that is a numeric. Ituses the previously define stored procedure to get the constraint name. Atext version of this procedure can be created by removing the cast, definingthe input parameter "newConstraint" as varchar(255).CREATE PROCEDURE [dbo].[ChangeIntConstraint](@tableName sysname,@columnName sysname,@newConstraint int)ASDeclare @conName sysnameexec GetConstraintName @tableName, @columnName, @constraintName = @conNameOUTdeclare @sql nvarchar(1024)set @sql = 'ALTER TABLE ' + @tableName + ' drop constraint ' + @conNameexec(@sql)set @sql = 'ALTER TABLE ' + @tableName + ' ADD CONSTRAINT ' + @conName + 'DEFAULT (' + CAST(@newConstraint AS varchar(255)) + ') FOR ' + @columnNameexec(@sql)
how can you alter a table so that you can add a default value whenever the field is NULL? for example, whenever the table is brought up in a query, NULL is replaced with UNKNOWN
Hi: I need to change a column's datatype from tinyint to int as follows: alter table tableName alter column column1 int
but with error <<'DF__LandMarks__color__6A50C1DA' is depending on it.>>
However, this old default is not part of the constraint. Thus, the only way is to delete it from sysobjects.
unfortunately, the following code I have to commented since they could only be executed line by line, not within a begin...end block. --exec master.dbo.sp_configure 'allow updates', 1 --reconfigure with override --delete from sysobjects -- where name = 'DF__LandMarks__color__6A50C1DA' -- and type = 'D' --exec master.dbo.sp_configure 'allow updates', 0 --reconfigure with override
I need to update 10 server around 2500 databases with this change. I have looked INFORMATION_SCHEMA related views, but not found default related, maybe I missed something.
I'm trying to write some code that will alter column to change its type, in this case from Nvarchar to Int, but I'm not sure if there will be any columns that are uncovertable (say, there's a string that does not have an Int value). In this case, I'd like it to default to 0. Is there a way to write a T-SQL statement to do this, or will I have to write an UPDATE stamement first to clear out any problem cases?
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
Hi people,I?m trying to alter a integer field to a decimal(12,4) field in MSACCESS 2K.Example:table : item_nota_fiscal_forn_setor_publicofield : qtd_mercadoria integer NOT NULLALTER TABLE item_nota_fiscal_forn_setor_publicoALTER COLUMN qtd_mercadoria decimal(12,4) NOT NULLBut, It doesn't work. A sintax error rises.I need to change that field in a Visual Basic aplication, dinamically.How can I do it? How can I create a decimal(12,4) field via script in MSACCESS?Thanks,Euler Almeida--Message posted via http://www.sqlmonster.com
I know that the correct syntax to set the default on a column in SQL Server 2005 is:
Alter Table <TableName> Add Constraint <ConstraintName> Default <DefaultValue> For <ColumnName>
But from what I can gather, the SQL-92 syntax is:
Alter Table <TableName> Alter Column <ColumnName> Set Default <DefaultValue>
This generates an error on SQL Server 2005.
Am I wrong about the standard syntax for this statement? If this is the standard, why doesn't SQL Server 2005 support it? I am trying to avoid code that will only work on certain database managers.
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
I have a integer column which has Default value alredy defined. How do i alter this column so that it's defult value will be removed. I want to do this using T-SQL statement. Not through design mode.
Hello,I have an SQL Server 2005 database that I'm trying to create using script.Everything works fine, but when I click on "Database Diagrams" I get anerror message that there is no database owner, and of course when I show theDatabase Properties, the database was created without one. Is there any wayto ALTER AUTHORIZATION to a default owner or system administrator, somethingvalid?Any direction would be appreciated.Thanks!Rick
I have a integer column which has Default value alredy defined. How do i alter this column so that it's defult value will be removed. I want to do this using T-SQL statement. Not through design mode.
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 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
Is there a way, in the ALTER statement, to have the value default to the current date -- GETDATE() -- anytime a row is inserted w/out an explicit value for the column.
Hi all, I am trying to do a very basic ALTER Command and am trying to change its DEFAULT value. Code below is what I currently have:
Code Snippet
ALTER TABLE Table_1
ALTER COLUMN TEST VARCHAR(1000) NULL DEFAULT 2
Thanks, Onam.
*UPDATE* I found this code but are there alternative methods? Additionally, if I was to update its DEFAULT value again how would I go about doing that? Do I first have to remove the CONSTRAINT and then run the command?
Code Snippet
ALTER TABLE Table_1 ADD CONSTRAINT DF_Albumns_Comment DEFAULT 2 FOR TEST
