On 2018-08-20 11:46 PM, D Burgess wrote:
Is there a historical reason why sqlite does not have a UNSIGNED type
to go with INTEGER?
What is the value of a built-in UNSIGNED type when we already have INTEGER? I
can't think of any. -- Darren Duncan
On Friday, 24 August, 2018 17:31, w...@us.net wrote:
>"The parent key of a foreign key constraint is not allowed to use the
>rowid. The parent key must used named columns only."
>Why is this?
You should think of this as:
>"The parent key of a foreign key constraint is not allowed to use the
On 25 Aug 2018, at 12:31am, w...@us.net wrote:
> "The parent key of a foreign key constraint is not allowed to use the rowid.
> The parent key must used named columns only."
>
> Why is this?
Because it's not named. In theory you could later add a column named 'rowid'
to mean a BLOB column.
got it. Thanks.
On 2018-08-24 19:36, J Decker wrote:
On Fri, Aug 24, 2018 at 4:31 PM wrote:
"The parent key of a foreign key constraint is not allowed to use the
rowid. The parent key must used named columns only."
Why is this?
Which would be more efficient?
1) WITHOUT ROWID and column of
On Fri, Aug 24, 2018 at 4:31 PM wrote:
> "The parent key of a foreign key constraint is not allowed to use the
> rowid. The parent key must used named columns only."
>
> Why is this?
> Which would be more efficient?
> 1) WITHOUT ROWID and column of INTEGER PRIMARY KEY
> or
> 2) an aliased rowid.
"The parent key of a foreign key constraint is not allowed to use the
rowid. The parent key must used named columns only."
Why is this?
Which would be more efficient?
1) WITHOUT ROWID and column of INTEGER PRIMARY KEY
or
2) an aliased rowid.
Background: The data is sparse, incomplete, and
Hi Richard and David,
Many thanks for your responses, very useful.
I'll work with that (being careful to look at the OpCode documentation for my
release of sqlite!) and see where I get to.
Cheers,
Dave
Ward Analytics Ltd - information in motion
Tel: +44 (0) 118 9740191
Fax: +44 (0) 118
On 8/24/18, David Raymond wrote:
> Running just "explain some query" will give you the virtual machine program
> that it plans on using. You can then scan through that to see what it's
> doing. Note that the descriptions on the below page for those op codes are
> sometimes really confusing and it
Running just "explain some query" will give you the virtual machine program
that it plans on using. You can then scan through that to see what it's doing.
Note that the descriptions on the below page for those op codes are sometimes
really confusing and it can take a while to decypher what's
HI all,
I would like to use the following example as a learning exercise for myself
to check my understanding of part of sqlite processing.
I have the following query which functionally works fine, and to be upfront
about it the volume of data is so small that performance is not an issue.
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