Dennis Cote wrote:
To get every N'th row after deletions you need some way to assign a
series of integers to the result rows. The easiest way I can think of
is to create a temporary table from your initial query. Then you can
use the modulus operator to select every N'th record from that table
On 3/27/06, Uma Venkataraman <[EMAIL PROTECTED]> wrote:
> I would like to delete n records from a table, based on some condition. Can
> some one please let me know how to do this with sqlite?
http://sqlite.org/lang_delete.html
The following statement should help:
delete from "table_name" where "condition";
Of course, you'd make appropriate substitutions for "table_name" and
"condition".
HTH
On 3/27/06, Uma Venkataraman <[EMAIL PROTECTED]> wrote:
>
> I would like to delete n records from a table, based on some conditio
I would like to delete n records from a table, based on some condition. Can
some one please let me know how to do this with sqlite?
Thanks
Thanks Dennis..that seems to do the trick...
- Original Message -
From: "Dennis Cote" <[EMAIL PROTECTED]>
To:
Sent: Monday, March 27, 2006 2:46 PM
Subject: Re: [sqlite] help with sqlite command
Jay Sprenkle wrote:
I believe rowid is assigned dynamically to the
Too bad sqlite doesn't have Oracle's ROWNUM:
"Pseudo-Columns
While not actual datatypes, Oracle supports several special-purpose
data elements. These elements are not actually contained in a table,
but are available for use in SQL statements as though they were part
of the table.
ROWNUM
For each
On 3/27/06, Dennis Cote <[EMAIL PROTECTED]> wrote:
> Jay,
>
> The rowid is the key from the btree used to store the table rows. It is
> not generated dynamically.
Ah. Thanks! Learn something new every day.
Jay Sprenkle wrote:
I believe rowid is assigned dynamically to the result set so it would
give a different
set of results for a different query.
Jay,
The rowid is the key from the btree used to store the table rows. It is
not generated dynamically.
To get every N'th row after deletion
"Uma Venkataraman" <[EMAIL PROTECTED]> writes:
> Hi Jay,
>
> Thanks for your reply. I am trying the command
>
>select * from mytable where row_id = row_id % 5
Try this instead:
SELECT * FROM mytable WHERE ROWID % 5 = 0;
Note that if you have an integer primary key in mytable, then ROWID a
Clark
- Original Message
From: Uma Venkataraman <[EMAIL PROTECTED]>
To: sqlite-users@sqlite.org
Sent: Monday, March 27, 2006 11:07:18 AM
Subject: Re: [sqlite] help with sqlite command
Hi Jay,
Thanks for your reply. I am trying the command
select * from mytable where row_id =
> Thanks for your reply. I am trying the command
>
> select * from mytable where row_id = row_id % 5
>
> from sqlite browser and it says, no such column row_id.. Also I replaced
> row_id with rowid and it gave only the first 4 records from my table. My
> other concern is I will be deleting and
adding records to the table. If I
want to select every nth record after such deletions and additions will the
row id not get affected?
Thanks
Uma
- Original Message -
From: "Jay Sprenkle" <[EMAIL PROTECTED]>
To:
Sent: Monday, March 27, 2006 1:56 PM
Subject: Re: [s
On 3/27/06, Uma Venkataraman <[EMAIL PROTECTED]> wrote:
> Hi All,
>
> I need to be able to select the TOP N rows from a table. How do i do it =
select * from mytable limit 5
> with sqlite? Also how does one select EVERY Nth row from a table?
use modulus operator for that:
select * from mytabl
Hi All,
I need to be able to select the TOP N rows from a table. How do i do it =
with sqlite? Also how does one select EVERY Nth row from a table?
Thanks
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