On Mon, Jun 27, 2011 at 5:58 PM, Thom Brown <t...@linux.com> wrote:
>
> Try coalesce: 
> http://www.postgresql.org/docs/9.0/static/functions-conditional.html#AEN15541
>
> So if foo is a null value, and you used COALESCE(foo, 'bar'), the
> output would be 'bar', otherwise it would be whatever the value of foo
> is.
>


On Mon, Jun 27, 2011 at 5:59 PM, Rick Genter <rick.gen...@gmail.com> wrote:
> Either use '' as some_type, or use COALESCE(some_type, '').
>


Thank you both, that worked fine.

-- 
Regards,
     Asfand Qazi
     Team 87 HTGT
     Wellcome Trust Sanger Institute

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