Re: Duplicating a table row while honouring key constraints

Gordon wrote:

> At first I thought INSERT INTO table_name SELECT * from table_name
> where primary_key = unique_value would do it, but that would obviously
> violate the primary key uniqueness constraint. I'm wondering if
> there's a way to do this where I only grab the data to be copied and
> let the database work out the new primary key itself.

Well, try
INSERT INTO table_name SELECT col1, col2, ... FROM table_name WHERE
primary_key = unique_value

where the colX list excludes the primary key columns. Perhaps add
DEFAULT specification for those so that they are generated from a
sequence or whatever default generator you have.

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