On 21 Apr 2014, at 18:13, Andy Goth <andrew.m.g...@gmail.com> wrote:

> On 4/21/2014 6:04 AM, Richard Hipp wrote:
>> On Mon, Apr 21, 2014 at 6:18 AM, Neville Dastur wrote:
>>> Google only showed up that UNIQUE needs to be added regardless of the
>>> column being a PRIMARY KEY.
>> 
>> Google is wrong.  The UNIQUE is superfluous.  PRIMARY KEY always
>> implies UNIQUE.  Always.
> 
> PRIMARY KEY also is supposed to imply NOT NULL.  However, for historical
> reasons, SQLite allows NULL in PRIMARY KEY columns if the column is not
> INTEGER, not explicitly NOT NULL, and not in a WITHOUT ROWID table.

Does that mean that I should really explicitly state NOT NULL for non-integer 
primary keys?

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