I don't have access to that level of software, so that's the problem.
You mean your experience with SQLite is based on using sqlite3 command
line utility only? If so you can just redirect its output to sed which
will do something like s/|\+/|/g.
If your experience with SQLite is based on using
INSERT OR IGNORE INTO Table (Field) SELECT SomeOtherField FROM OtherTable
ORDER BY SomeOtherField
produced significant reduce in data flow. (Field Is indexed in Table). I
don't think the difference is related to some caching since the variant
without ORDER BY shows 50 MB data transfer for 17
Hi,
I had a hard time to understand the FAQ entry on UNIQUE constraint -- in
the end I had to try out sqlite's behavior myself because the FAQ -- so
maybe the wording can be improved and/or an example added.
Here a some comments:
*(26) The SQL standard requires that a UNIQUE constraint be
http://www.sqlite.org/nulls.html
seems to clarify things for me on this topic.
Adam
On Wed, Dec 30, 2009 at 9:13 AM, Tobias Hoffmann
lsqlite-l...@thax.hardliners.org wrote:
Hi,
I had a hard time to understand the FAQ entry on UNIQUE constraint -- in
the end I had to try out sqlite's
To be honest I'm a bit confused about the wording of these two bullets
too. But here're my comments and clarifications:
Perhaps you are referring to the following statement from SQL92:
A unique constraint is satisfied if and only if no two rows in
a table have the same
Hello,
I need a unique value in the range 0 to 2^32 for every row in my table.
What is the best way to implement this in SQLite?
I suppose that for the first 2^32 inserts I could just use the
rowid, but after that the rowid might increase above 2^32 while my
desired unique value should look for
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Nikolaus Rath wrote:
The perfect solution would be to tell SQLite that it should restrict the
rowid to 2^32, but I couldn't find a documented way to do that.
I have seen people post about an undocumented and unsupported compile time
option to
Nikolaus Rath wrote:
The only two ideas that come to my mind is to use a random search like
sqlite uses for the rowid, or to store the unused values in an
additional table. But I have serious doubts about both solutions. While
random search may have a good chance of success if there are 2^64
Since you're asking the question, it seems safe to assume that you
expect the table to have on the order of 2^32 values? And that you'll
be freeing up old values by deleting rows from the table?
First off, don't use rowid. Use my_id INTEGER PRIMARY KEY or
something like that. rowids are an
Regarding: ...is to use an MD5/sha1 or similar checksum of the record and use
the last 32 bits of that checksum. It is extremely unlikely for there to be a
collision ...
Except that the OP wrote: ...I don't think it works very well for 2^32
possible values (when there may well be only a
Roger Binns rogerb-jfdgoz7s+bwwqnjq7v0...@public.gmane.org writes:
The only effect is what happens behind the scenes.
I thought that might be so.
echo 'pragma encoding=UTF-16;'
Or no doubt by querying it out, sqlite3 old.db 'pragma encoding'.
But that's something .dump could helpfully do
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Kevin Ryde wrote:
Or no doubt by querying it out, sqlite3 old.db 'pragma encoding'.
But that's something .dump could helpfully do itself, could it?
The SQLite shell can't read your mind :-) Adding something like this would
require yet another
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Griggs, Donald wrote:
Except that the OP wrote: ...I don't think it works very well for 2^32
possible values (when there may well be only a couple of hundred unused
ones)
Sorry, I missed that.
Anyway, Scott has beat me to a suggestion
dear listers,
i am trying to change the output by 'sqlite3 mydb .mode csv'.
however, when i type 'sqlite3 mydb .show', I couldn't see the change
of mode at all.
i appreciate it if anyone can point me to a right direction.
thanks and happy new year!
wensui
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It definitely changes for me as shown below. If you want further help then
you need to show the exact commands you are running and their output.
$ sqlite3 mydb
SQLite version 3.6.16
Enter .help for instructions
Enter SQL statements terminated with a
On 31 Dec 2009, at 2:13am, Wensui Liu wrote:
i am trying to change the output by 'sqlite3 mydb .mode csv'.
however, when i type 'sqlite3 mydb .show', I couldn't see the change
of mode at all.
Each new 'sqlite3' command starts a new instance of the application, and the
new instance starts
Scott Hess sh...@google.com writes:
Hello,
I need a unique value in the range 0 to 2^32 for every row in my table.
What is the best way to implement this in SQLite?
I suppose that for the first 2^32 inserts I could just use the
rowid, but after that the rowid might increase above 2^32 while
I want to use sqlite fts3 on symbian, my environment is
windows xp
carbide c++ 2.0
S60_3rd_FP2_SDK_v1.1
sqlite 3.6.21
os_symbian.c from sqliteS60 (http://sourceforge.net/projects/sqlites60/ )
When I test my app, after correctly insert and commit some(more than 100)
documents to fts3, the
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