Re: [sqlite] Help!

2018-10-02 Thread Keith Medcalf

Just pick "File -> Open" off the menu and then point and click that hooey-gooey 
at the database file ... (Assuming here -- most hooey-gooeys have a File Open 
menu clickety-pokey to open a file ...)  

Though since the problem is with "SQLite Studio" I would suggest either RTFM or 
contacting the authors of that software for assistance.  I doubt that anyone 
here can help you with SQLite Studio anymore than they could help you with 
Firefox (which also uses SQLite3 databases) or even Windows itself (the 
MickeyMouse Store uses an SQLite3 database).

 ---
The fact that there's a Highway to Hell but only a Stairway to Heaven says a 
lot about anticipated traffic volume.


>-Original Message-
>From: sqlite-users [mailto:sqlite-users-
>boun...@mailinglists.sqlite.org] On Behalf Of Simon Slavin
>Sent: Tuesday, 2 October, 2018 18:26
>To: SQLite mailing list
>Subject: Re: [sqlite] Help!
>
>On 2 Oct 2018, at 11:00pm, am...@juno.com wrote:
>
>> As such, I would be most appreciative if someone would e-mail me
>incredibly explicit directions on how to import a file in SQLite DB
>to SQLite studio.
>
>The two programs should be able to open the same database files.
>SQLite has only one format, and all SQLite files are in that format.
>Make a copy of the SQlite DB file and put it in a folder that SQLite
>studio has access to.
>
>Simon.
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Re: [sqlite] Help!

2018-10-02 Thread Simon Slavin
On 2 Oct 2018, at 11:00pm, am...@juno.com wrote:

> As such, I would be most appreciative if someone would e-mail me incredibly 
> explicit directions on how to import a file in SQLite DB to SQLite studio.

The two programs should be able to open the same database files.  SQLite has 
only one format, and all SQLite files are in that format.  Make a copy of the 
SQlite DB file and put it in a folder that SQLite studio has access to.

Simon.
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[sqlite] Help!

2018-10-02 Thread am...@juno.com
 October 2, 2018 Dear Good People: While I have both SQLite DB and SQlite 
Studio on I my computer, I have not been able to export files from SQLite DB to 
SQLite Studio--so that I get all the database functions I need. This involves 
say putting a field in ascending order, filtering out information that I want 
via a search. As such, I would be most appreciative if someone would e-mail me 
incredibly explicit directions on how to import a file in SQLite DB to SQLite 
studio. Thank you very much in advance for helping me out on this dilemma 
without charging me. Respectfully yours, Alex Stavis P.S. If you can answer me 
within one hour that would be great--as sometimes I get an overflow message 
after one hour.

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Re: [sqlite] DB To DB Transfer Time

2018-10-02 Thread dmp
>> On Sep 25, 2018, at 11:14 AM, dmp  wrote:
>>
>> The result for the 50K file db test of SQLite was 370.184
>> seconds. Is this a reasonable transfer speed, given the
>> conditions noted?

> You haven't specified how much of that time was spent in SQLite. For all
we know,
> 370 seconds was spent in MariaDB and your own code, and it only took
.184 sec for
> SQLite to insert the rows :)

> Try running your code with a profiler. Or at least wrap some quick &
dirty timing
> code around your functions that call SQLite.

> Also, make sure to insert as many rows as possible within a transaction.
Committing
> a transaction in SQLite is quite expensive due to filesystem flushing.

> —Jens


Hello,

The DB to DB code is a Java plugin for my application. It takes
a query to the current database, converts that into a schema,
creates a new table in the selected sink database of a comparable
schema, then begins transferring data.

The data transfer is setup with two threads, the source database
thread loading data and the sink database thread inserting via
prepared statements in a batch mode. The threads are connected
via an ArrayBlockingQueue pipe. I log the pipe capacity as the
process takes place.

The timing given takes place at the beginning of the transfer
process and stops when completed, threads join.

Now from the users of the forum, I did some testing to establish
a reference transfer time. After some thought I realized I could
get that number by just performing a direct file transfer of
the created SQLite database file from the MariaDB server to the
client machine. Results 54 seconds.

Upon further testing, increasing the pipe size, 250 to 1000.
I was able to get the time for the SQLite test to 164.721 sec.
Average pipe capacity, 85 objects. That tells me that I could
do better perhaps using two loading threads. I already suspected
the loading thread filler to be slower and therefore had coded
it with an increased priority of one.

The testing so far shows SQLite comparable to the other tested
memory databases. SQLite beat out all but one with a file
database. One of the databases did miserable with the pipe
capacity close to saturated and a time of 1374.614 sec.

Testing:
Transfer 50,000 rows, (Integer, Real, 0-10k Text, 0-10k blob)
Resulting SQLite file database size: 404Mb.

Updated SQLite Log Database:
https://github.com/danap/db_to_filememorydb/blob/master/docs/dblog/db_To_db_Parameters-log.db

danap.

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