On Tue, Mar 23, 2010 at 5:33 PM, Nilesh Govindarajan <lists(at)itech7(dot)com> wrote:
> On 03/23/2010 11:47 AM, John R Pierce wrote:
>>
>>> How to convert zero length string to null ?
>>
>>
>>
>> UPDATE yourtable SET name=NULL WHERE name='';
>>
>>
>
> No I don't want to replace it in the table. Just in the query result.
use a CASE construct.
select case name='' then null else name end from table where ......
Ian