Re: VARCHAR2: NULL value vs. empty string - Proof Oracle Supports Zero Length Strings

On Sun, 14 Dec 2003, damorgan_at_x.washington.edu wrote:

> In the ANSI standard NULL is defined as the lack of a value
> ... not as a zero length string and this is not subject to
> debate. It is the definition.

    ORA> create table tstnull (fld varchar2(10));

    Table created.

    ORA> insert into tstnull values (null);

    1 row created.

    ORA> insert into tstnull values ('');

    1 row created.

    ORA> select count(*) from tstnull where fld is null;

      COUNT(*)

             2

    ORA> select count(*) from tstnull where fld = '';

      COUNT(*)

             0

If your posted phrase is the definition, it looks like Oracle isn't within compliance.

-- 
Galen Boyer