Insert default value when parameter is null

Question

I have a table that has a column with a default value:

create table t (
    value varchar(50) default (\'something\')
)

I\'m using a stored

Answer 1

This is the best I can come up with. It prevents sql injection uses only one insert statement and can ge extended with more case statements.

CREATE PROCEDURE t_insert (     @value varchar(50) = null )
as
DECLARE @sQuery NVARCHAR (MAX);
SET @sQuery = N'
insert into __t (value) values ( '+
CASE WHEN @value IS NULL THEN ' default ' ELSE ' @value ' END +' );';

EXEC sp_executesql 
@stmt = @sQuery, 
@params = N'@value varchar(50)',
@value = @value;

GO