Subject Alter Colum to set a Default Value
Author Marius Labuschagne

Is it possible to issue a statement to change or set the default value
for an existing column?

I have tried the following:
alter table stock alter column StockType type varchar(20) default

But this does not work, it produces an error:
Invalid token.
Dynamic SQL Error.
SQL error code = -104.
Token unknown - line 1, column 59.

The StockType field is already in the database table with a varchar(20)
definition, I just need to add a default value for this field.

Any help appreciated.