What is your goal here? Is this a file linking two other files, the
group_conclusion file and the Pad_analysis_result file? Or something like
that? Where you search for all of the records with a single group_conclusion
and then reference the analysis_result records?
My first question is are these
Clausen [EMAIL PROTECTED]
>
> - Original Message -
> From: "sherzodR" <[EMAIL PROTECTED]>
> To: "Demirchyan Oganes-AOD098" <[EMAIL PROTECTED]>
> Cc: <[EMAIL PROTECTED]>
> Sent: Thursday, December 06, 2001 11:58
> Subject: Re: Creatin
y, December 06, 2001 11:58
Subject: Re: Creating MySQL table w/2 primary keys
>
> As far as I know, you can't do tht. What you could do instead is
> have one Primary Key col and make another one UNIQUE.
>
> I did that several times, and it does work!
>
> --
>
> W
December 2001 9:42 a.m.
To: sherzodR
Cc: Demirchyan Oganes-AOD098; '[EMAIL PROTECTED]'
Subject: Re: Creating MySQL table w/2 primary keys
I found a way to have two primary key, if those keys relate on many
columns.
mysql> create table keytest(
-> col1 int not null,
->
for a table in a database (just so my message makes it to the list):
can you make a concatenated primary key, then make the second one an
index?
-
Before posting, please check:
http://www.mysql.com/manual.php (the man
I found a way to have two primary key, if those keys relate on many
columns.
mysql> create table keytest(
-> col1 int not null,
-> col2 int not null,
-> unique index (id1,id2),
-> unique index (id2,id1)
Query OK, 0 rows affected (0.01 sec)
mysql> describe keytest;
+---+--
using primary key (col1, col2) makes no index on col2... which is not
good if you lookup only in col2
primary key (col1),
unique index (col2)
don't forget to add "not null" beside your col2 definition.
Etienne
rc wrote:
>
> why not use a concatenated Primary key?
>
> create table tname
> c
On 6 Dec 2001 [EMAIL PROTECTED] wrote:
> Your message cannot be posted because it appears to be either spam or
> simply off topic to our filter. To bypass the filter you must include
> one of the following words in your message:
>
> database,sql,query,table
>
> If you just reply to this message
why not use a concatenated Primary key?
create table tname
col_name1 int,
col_name2 int,
PRIMARY KEY (col_name1,col_name2)
you get the drift
On Thu, 6 Dec 2001, sherzodR wrote:
>
> As far as I know, you can't do tht. What you could do instead is
> have one Primary Key col and make
As far as I know, you can't do tht. What you could do instead is
have one Primary Key col and make another one UNIQUE.
I did that several times, and it does work!
--
What they need to teach in school is for people to think for themselves. :-)
-- Larry Wall in <[EMAIL PROTECTED]>
10 matches
Mail list logo
