Comments on: SQL SERVER – Add Column With Default Column Constraint to Table

By: Arvind baghel

Arvind baghel — Tue, 17 Jan 2012 13:56:55 +0000

Msg 156, Level 15, State 1, Line 2
Incorrect syntax near the keyword ‘set’.

By: Shafayat

Shafayat — Wed, 07 Dec 2011 02:52:24 +0000

Thanks. Your suggestion helps me.

By: mahesh singh

mahesh singh — Wed, 23 Nov 2011 12:26:14 +0000

i want to add a coloumn name in my table name member aster but it allow only null value otherwise it say it’s not possible try with alter table plz help me
the given error by sql 2005 is :-
‘MemberMaster’ table
- Unable to modify table.
ALTER TABLE only allows columns to be added that can contain nulls, or have a DEFAULT definition specified, or the column being added is an identity or timestamp column, or alternatively if none of the previous conditions are satisfied the table must be empty to allow addition of this column. Column ‘MemberLogin’ cannot be added to non-empty table ‘MemberMaster’ because it does not satisfy these conditions.

help help help

By: Shambu Sathyan

Shambu Sathyan — Mon, 17 Oct 2011 14:33:29 +0000

Thanks for your valuable time and quick reply.

There are more than 13000 rows for my condition.
Since I already had computed columns in the table and I want to use the same columns for my new Computed column, I put it in code.
But because of the performance issue I need to do that in the back end itself.

By: madhivanan

madhivanan — Mon, 17 Oct 2011 09:47:22 +0000

How many rows are there in the database? Also why are you doing it via Visula Studio? Have you tried doing the same in Query Analyser?

By: Shambu Sathyan

Shambu Sathyan — Sat, 15 Oct 2011 07:20:22 +0000

Hello Sir,

I have a requirement where in I want to add a Column which can calculate values by its own.
What I want to do is I want to add a expression to that column.
I could do that in visual studio using Datatable.columns(index).expression. but it consumes lot of time. please help.

Here’s a small scenario
CREATE TABLE #Temp (RowNo int identity(1,1),Quantity Decimal(18,5) ,ID int, StudentID int)

Insert into #Temp
Select Quantity,ID, StudentID From Student Where ID = 53

Select * from #Temp

Alter Table #Temp Add Calc Decimal(18,5) Default (‘[Quantity] * [ID] * 100′)

Select * from #Temp
Drop Table #Temp

By: Ade Ruyani

Ade Ruyani — Tue, 04 Oct 2011 03:09:49 +0000

Hello… can i change default to another type? and drop the default?

please help me..

thanks for advance
Ade Ruyani

By: madhivanan

madhivanan — Thu, 29 Sep 2011 10:21:01 +0000

It is not possible. You need to drop the column and add new column with default option

By: madhivanan

madhivanan — Thu, 29 Sep 2011 10:10:13 +0000

Alter table tablename
add newcolumn datatype

By: Ram

Ram — Thu, 29 Sep 2011 09:36:43 +0000

How to add new cloumn to table to hold archival status flag

By: madhivanan

madhivanan — Fri, 02 Sep 2011 08:09:12 +0000

Note that it will affect newly inserted data not the old data. You need to write update statement to update old data

By: Anuj

Anuj — Thu, 01 Sep 2011 01:47:28 +0000

This constraint doesnot add the default value in existing rows in the table??…

ALTER TABLE dbo.utl_site ADD AMI_active CHAR(1)
CONSTRAINT DF_utl_site_AMI_active DEFAULT ‘N’ NULL

all of the rows of utl_site still remains NULL not ‘N’

Can u explain please?

By: madhivanan

madhivanan — Thu, 04 Aug 2011 11:41:48 +0000

I dont think default values will affect performance

By: jaheer

jaheer — Thu, 04 Aug 2011 07:09:52 +0000

What will be the performance impact on inserts if we have default columns for a table

By: madhivanan

madhivanan — Mon, 18 Jul 2011 11:32:13 +0000

How will modify data while creating a table? Have it as default value and remove that column from the insert statement

By: Alexis

Alexis — Fri, 15 Jul 2011 12:34:51 +0000

Hi,
I’m using SQL Server 2008. I’m dynamically creating a Table with default value of ‘NP’ for a some columns. that columns may have “Null” string value, so I would like to set the default value(“NP”) for “Null” string while creating a Table. Please help me on this. If this not possible,please let me know.

Thanks
Alexis

By: Johnny

Johnny — Thu, 28 Apr 2011 13:36:02 +0000

May i know how to add default value to existing table column?

By: madhivanan

madhivanan — Fri, 01 Apr 2011 06:11:23 +0000

The ordinal position of the column doesnt matter as long as it is used in the specific order in the select statement. If yo still need it, do it via Management studio

By: Abhijoy

Abhijoy — Mon, 28 Mar 2011 04:07:49 +0000

The information was quite helpful.Thank you
I have a table with 5 columns and i need to insert my new column after the second column.How do i achieve this.

By: Gaurav

Gaurav — Thu, 03 Mar 2011 14:07:02 +0000

thanks for this information. I was using alter table table_name add( First_Name varchar(20), Last_Name varchar(20)) … but it shows an syntax error.

By: Madhivanan

Madhivanan — Fri, 10 Dec 2010 11:14:33 +0000

Do it via Management studio

By: Janani

Janani — Thu, 09 Dec 2010 09:46:42 +0000

Hai …
i want sql script to add column in sql table with ordinal position specification.
is it possible. if Please help me ..

By: madhivanan

madhivanan — Tue, 09 Nov 2010 14:29:27 +0000

Script the objects and run them in another database. Use import/export wizard to export data

By: zahis

zahis — Tue, 09 Nov 2010 06:48:22 +0000

hi i wanna two existing tables to add in new database how to do this with schema and data????????

By: Madhivanan

Madhivanan — Tue, 07 Sep 2010 09:49:16 +0000

It means that he saved the post at 19th and publish it 21st only