Hello.
I want to update a row in a table with som data from another row.
Someting like this:
update $table set next = (select next from $table where id =" . $id[$i]
.. ") where id = (select next from $table where id =" . $id[$i] . ")
After searching mysql.com, I found out that I cut use someting called
select ... for update.
But how do you use it???
Rune Madsen
6  7476 
What's wrong with simply selecting the data, and then updating the row
you want to change? (2 statements). Or, I guess you're working from the
command line?
Rune Madsen wrote:
Hello.
I want to update a row in a table with som data from another row.
Someting like this:
update $table set next = (select next from $table where id =" .
$id[$i] . ") where id = (select next from $table where id =" . $id[$i]
. ")
After searching mysql.com, I found out that I cut use someting called
select ... for update.
But how do you use it???
Rune Madsen
What's wrong with simply selecting the data, and then updating the row
you want to change? (2 statements). Or, I guess you're working from the
command line?
Rune Madsen wrote:
Hello.
I want to update a row in a table with som data from another row.
Someting like this:
update $table set next = (select next from $table where id =" .
$id[$i] . ") where id = (select next from $table where id =" . $id[$i]
. ")
After searching mysql.com, I found out that I cut use someting called
select ... for update.
But how do you use it???
Rune Madsen
On Sat, 18 Oct 2003 21:57:11 -0400, BDR <jo*@noemail.com> wrote: What's wrong with simply selecting the data, and then updating the row
you want to change? (2 statements). Or, I guess you're working from the
command line?
I am working in php, but i want to avoid using more than one query if it
is posible.
Rune Madsen
On Sat, 18 Oct 2003 21:57:11 -0400, BDR <jo*@noemail.com> wrote: What's wrong with simply selecting the data, and then updating the row
you want to change? (2 statements). Or, I guess you're working from the
command line?
I am working in php, but i want to avoid using more than one query if it
is posible.
Rune Madsen
I only say this from a standpoint of business practicality:
Sometimes,
1. It's just better to quickly write the new code, or,
2. Make a small change the db
and get it done in an hour (saving $$$ in time and trouble) than to
1. Lament for 2-3 days over a single complex query that's too difficult
to get to work, or,
2. Write a monster page of code to accomodate a database format, when a
single addition of a new table field and adding another query or two
will do the same thing without all the code overhead.
It's a balancing act, but one that needs to be evaluated constantly in
development.
Best of luck.
Rune Madsen wrote: On Sat, 18 Oct 2003 21:57:11 -0400, BDR <jo*@noemail.com> wrote:
What's wrong with simply selecting the data, and then updating the row
you want to change? (2 statements). Or, I guess you're working from
the command line?
I am working in php, but i want to avoid using more than one query if
it is posible.
Rune Madsen
I only say this from a standpoint of business practicality:
Sometimes,
1. It's just better to quickly write the new code, or,
2. Make a small change the db
and get it done in an hour (saving $$$ in time and trouble) than to
1. Lament for 2-3 days over a single complex query that's too difficult
to get to work, or,
2. Write a monster page of code to accomodate a database format, when a
single addition of a new table field and adding another query or two
will do the same thing without all the code overhead.
It's a balancing act, but one that needs to be evaluated constantly in
development.
Best of luck.
Rune Madsen wrote: On Sat, 18 Oct 2003 21:57:11 -0400, BDR <jo*@noemail.com> wrote:
What's wrong with simply selecting the data, and then updating the row
you want to change? (2 statements). Or, I guess you're working from
the command line?
I am working in php, but i want to avoid using more than one query if
it is posible.
Rune Madsen This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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