Check For Column Existance Before Alter Table Statement
Feb 14, 2000
Hello all,
I am trying to add columns to several tables in a singular database. I want to check to see if the column exists in a given table first before executing the alter table command so that I can skip that command if the column already exists, and avoid aborting my script prematurely. I can't seem to find a way to check for the column's existance. Any suggestions?
Within the execution of a t-sql script how do I check for the existance of a temporary table associated with the session or a global temporary table?
My understanding is that the table name doesn't get placed in the current database sysobjects table - it goes into tempdb. But the object name is cryptic (so as to be unique) and I see no way of associating it with the current session (@@SPID).
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
Let me apologize in advance for what I know is a very basic question, but so far I'm not being terribly successful trying to find sample code to learn from.
I'm trying to write (my first!) .Net Script in SSIS to check for the existance of a file (since that seems to be the only way to do it).
I've created the Script Task, with the following settings:
PrecomplieScriptIntoBinaryCode = False (it complained at one point in time (possibly on validation))
Let me apologize in advance for what I know is a very basic question, but so far I'm not being terribly successful trying to find sample code to learn from.
I'm trying to write (my first!) .Net Script in SSIS to check for the existance of a file (since that seems to be the only way to do it).
I've created the Script Task, with the following settings:
PrecomplieScriptIntoBinaryCode = False (it complained at one point in time (possibly on validation))
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?
It is possible to alter multiple columns within a single alter table statement? I have got the following URL that tells it is not possible to alter multiple columns within in signle alert table statement. http://www.blogcoward.com/archive/2005/05/09/234.aspx[^] Does anyone know about that?
I've some huge table (over 100GB each), these table contain column of NTEXT, IMAGE. Application team needs to change these data types to VARBINARY(MAX), I've tested the modification in our lab and I noticed that the operation has been almost immediate so, I think that DB Engnine has not converted the existing data in the column but it has simply changed the definition of the column.
Or maybe NTEXT and IMAGE can be transparently converted into VARBINARY(MAX)?
Anyway, I want to be sure that the modified table is "coherent" I don't want that at a given point SQL Server tells me that some data is not readable.
I am trying to add a column with Alter Table, like this:
ALTER TABLE myTable ADD newColumn bit DEFAULT 0 NOT NULL
This works fine with SQL-server 7, but I get this error in 6.5:
'ALTER TABLE only allows columns to be added which can contain nulls. Column 'newColumn' cannot be added to table 'myTable' because it does not allow nulls.'
I also found this in the help files:
'Columns added to a table must be defined as NULL. When a column is added, the initial value for the column will be set to NULL. This restriction forces the ALTER TABLE statement to fail if the bit or timestamp datatypes are used.'
My question, is there any other way to do this on 6.5 ?
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
My client's website database is hosted by a third party. I need to alter one of the column definitions for the largest table in the database. Unfortunately, the transaction log fills up if I try to alter the table. I've done all the usual stuff like truncating the log, etc., but the simple fact is that the operation requires more log space than we have available. Therefore, we need to purchase additional disk space for the database. What I'm looking for is a way to roughly estimate how much log space will be required to alter this table so that we purchase enough but not too much additional space. The table has an identity primary key and 4 other single column indexes: one int, one datetime and two varchar(30) columns. Any suggestions? Thanks in advance.
For the length of Column ID is not enough, So I want to alter its length.The alter statement is:
ALTER TABLE student ALTER COLUMN ID CHAR(20)
For the table student is referenced by table score, the alter statement can not alter the column of the table student, and the SQL Server DBMS give the errors.
But, I can manually alter the length of the column ID in SQL SERVER Management Studio. How to alter column length of the master table(student) along with the slave table(score)?
I have the table table_x: col1 INT PRIMARY KEY col2 VARCHAR
I want to add col3 between col1 and col2. In MySQL it's done with the following query: ALTER TABLE table_x ADD col3 VARCHAR( 10 ) NOT NULL AFTER col1 ;
In sql server all i can do is to add the column to the end of table. Is there a way to insert a new column in the middle or to move a column to left/right?
Hi all, I am not over familiar with SQL, I am a VB programmer, simply I need to achieve the following within Enterprise Manager.
I have 2 tables, different designs, different number of rows, I simply need to check whether the contents of a column in the first table is in a column in the second table, just simply a table/column to table/column data check for the same data content.
Easy Peasy for you guys, any help would be appreciated.
Hifor MS SQL 2000/2005I am having a table (an old database, not mine) with char value for the column [localisation]Users[name] [nvarchar] (100) NOT NULL ,[localisation] [nvarchar] (100)NULLNow i have created a table [Localisation]Localisation[id_Localisation] [int] NOT NULL,[localisation] [nvarchar] (100) NOT NULLI am adding a new column to UsersALTER TABLE [Users] ADD [id_Localisation] int NULLand I want to update the Column [Users].[id_Localisation] before to drop the column [Users].[Localisation]something like UPDATE [Users] SET id_Localisation = (SELECT Localisation.id_LocalisationFROM Localisation FULL OUTER JOINUsers ON Localisation.Localisation = Users.Localisation)Users.Localisation can have a NULL value (then no id_localisation return)but it doesnt work because it returns > 1 rowthank youhow can I do it ?
Is it possible to add a column to a table using the "alter table"statement and specify where in the sequence of columns the new columnsits. If not is there any way to alter the order of columns using TSQLrather than Enterprise Manager / Design Table.TIALaurence Breeze
how do i check if a temp table of a given name already exists on the current connection?
in the application i am working on, some reports are very complicated and use temp tables generated on the fly. these tables do not get cleared up sometimes and the next table generation statement bombs. i do not want to touch that code.
1. We have user defined type (Sql type = bit ) with rule setting it to 0 2. New column(isVIP) was created using this user defined type 3. sp_unbindrule was used to unbind rule from new column (isVIP) 4. Alter table Client drop Column isVIP !!!! (invalid syntax )
In MS SQL Server, I have the following tables with some data in it.create table table1 (column1 varchar(32),column2 int not null,column10 varchar(255),.....primary key (column1, column2),);create table table2 (column1 varchar(32),column2 int not null,column20 varchar(255) not null,....foreign key (column1, column2) references table1(column1, column2));Now, I need to change the all column types from varchar to nvarchar tosupport internationalized character set.I am able to do so, for columns column10 in table1 and column20 oftable2 without any problems by using command:"alter table table1 alter column column10 nvarchar(255);"But, when I try the similar thing for column1 of table1/table2, amgetting one error message saying like: "ALTER TABLE ALTER COLUMN failedbecause one or more objects access this column". I guess, this iscoming because of foreign key relationship between the tables.NOTE: While defining the table2, for foreign key I have not specifiedanything like "on update cascase" ...etc.How can I resolve this issue? Any suggestions/solutions are reallyhelpful to me. Thanks in advance.