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.
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.
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 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.
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.
I have a table with ~30M records. I'm trying to add a column to the existing table with default value and have noticed following ... When using alter with default value- (Executes more than 45 min and killed forcefully)
ex: ALTER TABLE dbo.Table_X Add is_Active BIT CONSTRAINT DF_Table_X_is_Active DEFAULT 'FALSE' NOT NULL GO
When using update command after adding column with alter (without default value) it completes is 5 min.
ex: ALTER TABLE dbo.Table_X Add is_Active BIT NULL GO UPDATE Table_X SET is_Active = 0 WHERE is_Active IS NULL GO
Why there is so much of difference in execution times ? I was just trying to understand internal behavior of the SQL in these two scenarios.
Hi guys, If I have a temporary table called #CTE With the columns [Account] [Name] [RowID Table Level] [RowID Data Level] and I need to change the column type for the columns: [RowID Table Level] [RowID Data Level] to integer, and set the column [RowID Table Level] as Identity (index) starting from 1, incrementing 1 each time. What will be the right syntax using SQL SERVER 2000?
I am trying to solve the question in the link below: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2093921&SiteID=1
Thanks in advance, Aldo.
I have tried the code below, but getting syntax error...
ALTER TABLE #CTE ALTER COLUMN [RowID Table Level] INT IDENTITY(1,1), [RowID Data Level] INT;
I have also tried:
ALTER TABLE #CTE MODIFY [RowID Table Level] INT IDENTITY(1,1), [RowID Data Level] INT;
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
/* 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)
I would like to add an Identity to an existing column in a table using astored procedure then add records to the table and then remove the identityafter the records have been added or something similar.here is a rough idea of what the stored procedure should do. (I do not knowthe syntax to accomplish this can anyone help or explain this?Thanks much,CBLCREATE proc dbo.pts_ImportJobsas/* add identity to [BarCode Part#] */alter table dbo.ItemTestalter column [BarCode Part#] [int] IDENTITY(1, 1) NOT NULL/* add records from text file here *//* remove identity from BarCode Part#] */alter table dbo.ItemTestalter column [BarCode Part#] [int] NOT NULLreturnGOSET QUOTED_IDENTIFIER OFFGOSET ANSI_NULLS ONGOhere is the original tableCREATE TABLE [ItemTest] ([BarCode Part#] [int] NOT NULL ,[File Number] [nvarchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULLCONSTRAINT [DF_ItemTest_File Number] DEFAULT (''),[Item Number] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULLCONSTRAINT [DF_ItemTest_Item Number] DEFAULT (''),[Description] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULLCONSTRAINT [DF_ItemTest_Description] DEFAULT (''),[Room Number] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULLCONSTRAINT [DF_ItemTest_Room Number] DEFAULT (''),[Quantity] [int] NULL CONSTRAINT [DF_ItemTest_Quantity] DEFAULT (0),[Label Printed Cnt] [int] NULL CONSTRAINT [DF_ItemTest_Label Printed Cnt]DEFAULT (0),[Rework] [bit] NULL CONSTRAINT [DF_ItemTest_Rework] DEFAULT (0),[Rework Cnt] [int] NULL CONSTRAINT [DF_ItemTest_Rework Cnt] DEFAULT (0),[Assembly Scan Cnt] [int] NULL CONSTRAINT [DF_ItemTest_Assembly Scan Cnt]DEFAULT (0),[BarCode Crate#] [int] NULL CONSTRAINT [DF_ItemTest_BarCode Crate#] DEFAULT(0),[Assembly Group#] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULLCONSTRAINT [DF_ItemTest_Assembly Group#] DEFAULT (''),[Assembly Name] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULLCONSTRAINT [DF_ItemTest_Assembly Name] DEFAULT (''),[Import Date] [datetime] NULL CONSTRAINT [DF_ItemTest_Import Date] DEFAULT(getdate()),CONSTRAINT [IX_ItemTest] UNIQUE NONCLUSTERED([BarCode Part#]) ON [PRIMARY]) ON [PRIMARY]GO
I am using sql server ce.I am changing my tables sometimes.how to use 'alter table alter column...'.for example:I have table 'customers', I delete column 'name' and add column 'age'.Now I drop Table 'customers' and create again.but I read something about 'alter table alter column...'.I use thi command but not work.I thing syntax not true,that I use..plaese help me?
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
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
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
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?
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
Hi I’m trying to alter a table and delete a column I get the following error. The object 'DF__Morningst__LastU__19EB91BA' is dependent on column 'LastUpdated'. ALTER TABLE DROP COLUMN LastUpdated failed because one or more objects access this column. I tried deleting the concerned constraint. But the next time I get the same error with a different constraint name. I want to find out if I can dynamically check the constraint name and delete it and then drop the column. Can anyone help.IF EXISTS(SELECT 1FROM sysobjects,syscolumnsWHERE sysobjects.id = syscolumns.idAND sysobjects.name = TablenameAND syscolumns.name = column name)BEGIN EXECUTE ('ALTER TABLE tablename DROP CONSTRAINT DF__SecurityM__DsegL__08C105B8')EXECUTE ('ALTER TABLE tablenameDrop column columnname)ENDGO
I ran this query against the pubs database and it runs successfully
ALTER TABLE publishers ALTER COLUMN state CHAR(25)
I change the table & field names for my db as follows: ALTER TABLE customquery ALTER COLUMN toclause CHAR(25)
and run against my database and I get the following error - Incorrect syntax near 'COLUMN'.
My column name is correct - I don't know why it would run fine against pubs, but not my db. I do not have quoted identifiers turned on. I have tried using [] around my column name [toclause], but that didn't change anything. Any help would be appreciated. Thanks.
I have a table with a column defined thus: LOCNumber Varchar(100) in atable called Bookdata.If I execute ALTER TABLE BookData ALTER COLUMN LOCNumber varchar(100)on the table, does any work get done on the table and column?Or does SqlServer know that the column is already varchar(100) andnothingneeds to be done?If it does do some work, how do you tell it not to run this as it isalready a varchar(100) column. Right now my program just blindly doesthis ALTER TABLEstatement regardless of any conditions. Is this a potential problem?Thanks for any help.
I would like to know how to alter a column to have a default value. For instance I have a column AreaCode Char(3) in a table. I have data in the table and now I want to add a default value of '123' to the AreaCode column.
I tried the following but did not work. Alter Table Phone Alter Column AreaCode Char(3) Default '123'