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From:Sasha Pachev Date:March 12 1999 4:34pm
Subject:Re: MySQL and NULL entires
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Mike Machado wrote:
> 
> I did an alter table to add a column called billgroup as an int(10)
> 
> This worked ok and it set all the existing rows to have "NULL" in the
> new column. So I figured I would do a mass update to switch it then to
> "1".  These are the statements I executed but did not seem to change
> anything:
> 
> select billgroup from account limit 10;
> 
> +-----------+
> | billgroup |
> +-----------+
> |      NULL |
> |      NULL |
> |      NULL |
> |      NULL |
> |      NULL |
> |      NULL |
> |      NULL |
> |      NULL |
> |      NULL |
> |      NULL |
> +-----------+
> 10 rows in set (0.01 sec)
> 
> update account set billgroup = "1" where billgroup = "NULL";
> update account set billgroup = "1" where billgroup = NULL;
> update account set billgroup = "1" where billgroup = "";
> update account set billgroup = "1" where billgroup = '';
> update account set billgroup = "1" where billgroup = "0";
> 

update account set billgroup = "1" where billgroup is NULL;

is, not = will do the job


>

-- 
Sasha Pachev
http://www.sashanet.com
Thread
MySQL and NULL entiresMike Machado12 Mar
  • Re: MySQL and NULL entiresSasha Pachev12 Mar
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