Re: Where can I find detail information about constraint ?

On 23/09/2009 11:23, 纪晓曦 wrote:
> I want detail usage introduction about constraint,such as how to
> constrain a string to be exactly 4 character and start with 'z'.
> Where can I find the reference of CHECK? detail usage.

Try the documentation, presumably under CREATE TABLE:

  http://www.postgresql.org/docs

Ray.

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Raymond O'Donnell, Director of Music, Galway Cathedral, Ireland
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