Or use read.csv() followed by dbWriteTable from package RSQLite.
Or read.DIF() as the case may be (the DIF format for spreadsheets being simpler
than XLS).
Today, Gabor Grothendieck wrote:
>
> Here is how to do it in R. Download, install and start R and then
> paste the following code into R.
Would it be realistic to pretend to use SQLite as a column-store database by
leveraging ALTER TABLE ... ADD COLUMN massively and to expect better
performance?
Suppose that instead of defining a table like CREATE TABLE (key, c1, c2, ...
cn) I defined it as CREATE TABLE (key) followed by n-times
Question:
I wished to import a CSV file representing nulls as empty strings (nothing
between the commas). I observed that the .import command by default imports
those as empty strings.
A minimalistic example: Let's create a table T with a single column (c) and a
file containing only one new
Presumably you've already made this work for a transaction involving two tables
in the same database? Have you tried attaching a second database with Attach
Database and using a similar logic?
In other words, is your question about using multiple databases in a
transaction, or about how to
Floor and Ceil can be dynamically loaded. Check last entry here:
http://www.sqlite.org/contrib
Today, Artem Skoretskiy wrote:
>
> Hi all,
>
> According to the documentation https://www.sqlite.org/lang_corefunc.html
> SQLite does not provide some basic math functions such as floor and ceil.
>
Hi Richard,
Could you check that a bug report I emailed to you two days ago containing two
attachments has reached you? Double-checking in case there might have been a
mail malfunction or the original email got caught by a spam filter.
Jean
Have you looked at https://www.sqlite.org/src/artifact/af92cdaa5058fcec ?
Simon wrote:
|
| Do you have to use regexp ? The following works:
|
| sqlite> SELECT replace('The time is %s.', '%s', strftime('%s','now'));
| The time is 1437054006.
|
|
| On 15 Jul 2015, Rick asked:
| >
| > Is there a
Alternatively someone creates a couple of functions like Oracle's VSIZE and
DUMP and donates them to the community, maybe as part of a loadable extension
(I'd do but I haven't got the skills)
http://stackoverflow.com/questions/24240087/oracle-numberp-storage-size
-- Original message -
Using the shell tool, I've found that after switching to certain modes that
change separator values, the original separator settings are not restored when
I switch back to the previous mode, or only one of them is. This has the effect
that after switching back to the original mode it does not
In SQLite, every value you store is stored alongside its type. This is unlike
other databases where the column determines the type and every value stored
against it share it. In SQLite you could have a table in which all value types
as stored contradict all column types as declared, if you so
It's not mandatory to use x'' notation to insert into a blob, when one can
use cast.
The following should return blob content correctly without explicitly lying it
down as Hex:
sqlite> create table T (c blob check(typeof(c) = 'blob'));
sqlite> insert into T values ( cast('x y z' as blob) );
Please provide your code context, as in,
http://stackoverflow.com/questions/10746237/sqlite-in-c-sharp-throws-invalidcastexception-using-getbytes
Today, Bill wrote:
>
> All,
> Below is a .dump of the database I'm working with. I can use
> GetBytes() successfully on all the BLOB columns except
>
Today, Michael asked:
>
> I tried the following, but it returns different sizes every
time. But my test data is the same so I think it should have the
same size.
> ...
> Can you help me to get the size of 1 row? Is it possible?
>
Hi Michael,
Have you read all about the SQLite Database File
Try substituting all backslashes with forward slashes, i.e.,
file:/PC-Name/C/FolderName/data.db
If that doesn't work, maybe there is something going on with URI support in the
64bit build you're using.
Takashi Fukuda wrote:
>
> For x64 target compilation with
The likelihood() function, which should help select a query plan but otherwise
be logic-neutral, nevertheless seems to affect results returned by a Left Join,
when used as part of the join condition, possibly in other circumstances.
With the following sample data, the two SELECT queries should
ALUES() seemed to do
before, although in this case there is no VALUES:
CREATE TABLE y AS SELECT * FROM x;
- Original message -
From: Jean Chevalier <jcheval...@gmx.net>
To: sqlite-users at mailinglists.sqlite.org
Subject: Automatic column aliasing, SELECT vs VALUES
Date: Wed, 17 Jun 2015 22:0
I read that VALUES(expr-list) means the same as SELECT(expr-list), but
apparently not with regards to the metadata that's sent out along with
the values.
If I issue these two commands, in one case I end up with column names
"", ":1", ":2" (sequential), and in the other I end up with "1", "2",
The aftermath...
dir *. /x /b
h8 08 @_8 0o8 hN Q N xa8 b8 0f8
10 soubor?, 14,336 bajt?
I took that the .open command could be issued as ".open" to open a new
in-memory database and ".open ''" (followed by a pair of single quotes)
to open a new unnamed temporary file database.
I wonder what is going on here: After issuing a short combination of
these commands with/without putting
ct out their normal urges in unnatural ways."
And by God, have I seen plenty of that in places where I've worked? Coming
from people of all ranks.
J.B. Nicholson-Owens wrote:
|
| Jean Chevalier wrote:
| >
| > Somewhat contradictory the Mozilla Foundation being a member of the
| > SQ
Somewhat contradictory the Mozilla Foundation being a member of the SQLite
Consortium while their performance wiki prominently features a warning to
developers against using SQLite allegedly for performance reasons. Guard me
from my friends...
Check out cubeSQL Admin from sqlabs.com.? This turns SQLite into a
server; you can use the cubeSQL ODBC driver to connect to it from other
computers, among other methods.
[1] https://github.com/planetopendata/awesome-sqlite
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