How to Get Default Value of a Data Type in SQL Query.

Question

Hi all,
I am creating a procedure which will take input the table name and Column Name.
In the Output i would like to have the data type and default value of that data type which will be used by a another procedure to blank the selected column in the database.
I tried with SET NULL on the column but as the database is of navision the table have property set to NOT NULL.
Here is what i have done till now.
Create Procedure Get_Column_type
@parm_table_name nvarchar(200),
@parm_column_name nvarchar(20),
@parm_result nvarchar(20)OUTPUT
AS
BEGIN 
select @parm_result =
DATA_TYPE from INFORMATION_SCHEMA.COLUMNS IC
where TABLE_NAME = '[' + @parm_table_name +']' and COLUMN_NAME = '[' + @parm_column_name + ']'
END
GO
Now instead on write a case statement for so many data types in SQL, i was thinking is it possible someway that above procedure also returns the default value which i can set in another procedure.
Let me know if its possible or not? Thanks in advance.

Answer 1

Do you looking for something like this?
create table t10 ( c int default 1)
SELECT so.name AS table_name, 
          sc.name AS column_name, 
          sm.text AS default_value
     FROM sys.sysobjects so
     JOIN sys.syscolumns sc ON sc.id = so.id
LEFT JOIN sys.syscomments SM ON sm.id = sc.cdefault
    WHERE so.xtype = 'U' 
      AND SO.name = 't10'
 ORDER BY so.[name], sc.colid
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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