“Much safer to have a habit to name views like the table names they derive from
(when they derive from specific tables)”
That is what I am doing right now. So thanks for all the answers I got to
confirm that there is no easy way to do it.
Qiulang
At 2017-03-22 19:52:59, "R Smith"
Hello Richard !
I noticed that sqlite do not use any memoization in json1 functions.
For example jsonExtractFunc and others parse the json string every time
it's called even when the json string is the same.
minimal example : "select json_extract(json, '$.name') name,
json_extract(json,
Take a look at
http://www.sqlite.org/cgi/src/artifact/3ed64afc49c0a222?ln=2214,2233
(especially the assert within).
I may not be understanding something, but that assert seems pointless
to me. The point of the loop is to check all the columns in an index
to see if they are all binary collated.
Just to be sure, have you actually checked your right join syntax on a system
that supports it? Because I don't think what you have written there will
actually achieve what you think it will.
There is no three-way join operator that will perform a left and a right join
. No matter how you word
Unless I misunderstand the desired result, this query would be better formulated
using 2 left joins instead, like this:
SELECT ...
FROM Persons LEFT JOIN Pets ... LEFT JOIN PetAccessories ...
-- Darren Duncan
On 2017-03-22 2:22 AM, Chris Locke wrote:
An interesting discussion of it on
On 22/03/2017 11:33, 邱朗 wrote:
Hi,
Is there any way to drop view “automatically” when its associated table is
dropped?
It seems no way to do. Then if I drop a table, is there any (easy) way to find
views created based on it and I can drop view manually ?
A quick and dirty procedure:
On 2017/03/22 4:14 PM, Hick Gunter wrote:
Since LEFT JOIN and RIGHT JOIN while also swapping the tables are
interchangeable, why should this not work?
SELECT ... FROM clients LEFT JOIN ON ... ( suppliers LEFT JOIN stock ON ...)
WHERE ...;
HI Gunter,
They are interchangeable for 1 vs. 1
On 22 Mar 2017, at 11:52am, R Smith wrote:
>
> May I add further that views are tricky things. They can refer to multiple
> tables, or other views which in turn refer to multiple tables or yet other
> views (and have obscured the names of the original tables via "AS"
On Wed, Mar 22, 2017 at 1:33 PM, Clemens Ladisch wrote:
> Dominique Devienne wrote:
> > On Wed, Mar 22, 2017 at 12:52 PM, R Smith wrote:
> >> There is no way to easily implement an automatic view-of-table
> >> dropper. (I've tried to do something like
On Wed, Mar 22, 2017 at 9:30 AM, R Smith wrote:
>
> On 2017/03/22 9:53 AM, Eric Grange wrote:
>
>> For the sake of curiosity, is anyone (as in any human) using RIGHT JOIN?
>>
>> Personally I never had a need for a RIGHT JOIN, not because of theoretical
>> or design
Since LEFT JOIN and RIGHT JOIN while also swapping the tables are
interchangeable, why should this not work?
SELECT ... FROM clients LEFT JOIN ON ... ( suppliers LEFT JOIN stock ON ...)
WHERE ...;
-Ursprüngliche Nachricht-
Von: sqlite-users
On 2017/03/22 9:53 AM, Eric Grange wrote:
For the sake of curiosity, is anyone (as in any human) using RIGHT JOIN?
Personally I never had a need for a RIGHT JOIN, not because of theoretical
or design considerations, but it just never came into my flow of thought
when writing SQL...
I guess
Dominique Devienne wrote:
> On Wed, Mar 22, 2017 at 12:52 PM, R Smith wrote:
>> There is no way to easily implement an automatic view-of-table
>> dropper. (I've tried to do something like this for an sqlite tool long ago).
>
> Yes but... You can run a simple query on the view,
On Wed, Mar 22, 2017 at 12:52 PM, R Smith wrote:
> On 2017/03/22 12:37 PM, Richard Hipp wrote:
>
>> On 3/22/17, 邱朗 wrote:
>>
>>> Is there any way to drop view “automatically” when its associated table
>>> is dropped?
>>>
>>> There is no easy way to
On 2017/03/22 12:37 PM, Richard Hipp wrote:
On 3/22/17, 邱朗 wrote:
Hi,
Is there any way to drop view “automatically” when its associated table is
dropped?
It seems no way to do. Then if I drop a table, is there any (easy) way to
find views created based on it and I can
On 3/22/17, 邱朗 wrote:
> Hi,
>
>
> Is there any way to drop view “automatically” when its associated table is
> dropped?
> It seems no way to do. Then if I drop a table, is there any (easy) way to
> find views created based on it and I can drop view manually ?
>
There is no
Hi,
Is there any way to drop view “automatically” when its associated table is
dropped?
It seems no way to do. Then if I drop a table, is there any (easy) way to find
views created based on it and I can drop view manually ?
Thanks
Qiulang
___
You don't need derived tables, just use brackets for explicitly order the
execution of JOIN operators like this:
SELECT P.PersonName
, Pt.PetName
, Pa.AccessoryName
FROMPersons P
LEFT JOIN ( Pets Pt
JOINPetAccessories Pa
An interesting discussion of it on StackOverflow...
http://stackoverflow.com/questions/689963/does-anyone-use-right-outer-joins
To give one example where a RIGHT JOIN may be useful.
Suppose that there are three tables for People, Pets, and Pet Accessories.
People may optionally have pets and
Hello,
I tried to use System.Data.SQLite together with LINQ (LINQ-to-SQL that is).
Basically, I had the following classes:
class MsgDatabase : DataContext
{
public MsgDatabase(IDbConnection connection) : base(connection)
{
}
public readonly Table Msg = null;
}
}
[Table]
Evgeniy Buzin wrote:
> "Settings "Prism.Mvvm.ViewModelLocator.AutoWireViewModel" property has
> called exception...".
That "..." contains relevant information.
> System.Windows.Markup.XamlParseException
>
> What is the reason of this error?
Something related with XAML parsing. So not related
On 03/22/2017 05:58 AM, Ausama Majeed wrote:
Hello guys,
I am trying to do a connection between a database created with Sqlite and
my application in ns3. the sqlite engine is installed on ubuntu 16.04
machine and the output is enabled with ns3.26. I cann't do a simple select
query from ns3,
For the sake of curiosity, is anyone (as in any human) using RIGHT JOIN?
Personally I never had a need for a RIGHT JOIN, not because of theoretical
or design considerations, but it just never came into my flow of thought
when writing SQL...
I guess some automated SQL query generators could use
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