Question

Adding Data and Get Current Record

Asked by: skibama1

Is there a way to get the current record id of a data item that you are adding?  My problem is that I am inserting a value into a database  that has a autonumber as the key.  Is there a way to get the value of that key easily?  What I am having to do is go back after I add it and query for a value that has all the conditions of the data I just added.

It seems there should be some sort of reference to the data you just added without having to go back and query again.

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Asked On
2004-06-18 at 19:28:30ID21031123
Tags

record

,

current

Topic

ColdFusion Application Server

Participating Experts
3
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Comments
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Answers

 

by: pinaldavePosted on 2004-06-18 at 19:43:33ID: 11349577

yes sir,
wonderful Q. I just have done this today morning!!!

<cfquery datasource="#dsn#">
            declare @incomingmailid int;
            insert into incomingmail (contactid) values (#contactid#);
            select @incomingmailid = @@identity;
            insert into interactions (incomingmailid)
            values (@incomingmailid);
</cfquery>

I have given you complite query which is working in my system.
I am sure this helps.
Regards,
---Pinal

 

by: meapledooPosted on 2004-06-18 at 19:44:19ID: 11349580

The autonumber is not assigned until the record is inserted.  You can always query the most recent autonumber by using the following:

Select Top 1 RecordID from YourTable

Regards,
meapledoo

 

by: pinaldavePosted on 2004-06-18 at 19:45:04ID: 11349583

Extra note:
@@identity returns the latest values of the inserted record, which is last and you want.
There is another method also though that is not efficient and little slwo also
where you reverse the query and get the max number though I do not prefer that method.
Regards,
---Pinal

 

by: pinaldavePosted on 2004-06-18 at 19:47:09ID: 11349587

well the above single query does all the work instead of either running other query where either you reverse the table and get the top one record or get the max autonumber

you can use the query as
select top 1 recordid from yourtable order desc
though you have to do this in next query.
Regards,'
---Pinal

 

by: pinaldavePosted on 2004-06-18 at 20:00:55ID: 11349614

I am writing now the code of the alternate method which I discussed above.

<cfquery datasource="#DSN#" name="staff_detail">
      insert into staff(name) values ("Pinal Dave");
      </cfquery>


      <cfquery datasource="#DSN#" name="staff">
      SELECT TOP 1 * FROM Staff_contact
      ORDER BY id DESC
      </cfquery>

This is alternate method.
Regards,
---Pinal

 

by: skibama1Posted on 2004-06-18 at 20:21:12ID: 11349659

It just seems like there should be something easier like some kind of variable that is generated when the actual insert query occurs.

 

by: pinaldavePosted on 2004-06-18 at 20:22:09ID: 11349660

dear sir,
the variable is
@@identity
regards,
---Pinal

 

by: pinaldavePosted on 2004-06-18 at 20:22:56ID: 11349662

to use that variable you can use the query like following
<cfquery datasource="#dsn#">
          declare @incomingmailid int;
          insert into incomingmail (contactid) values (#contactid#);
          select @incomingmailid = @@identity;
          insert into interactions (incomingmailid)
          values (@incomingmailid);
</cfquery>
Regards,
---Pinal
PS. see the usage of the variable @@identity

 

by: skibama1Posted on 2004-06-18 at 20:28:43ID: 11349673

I am trying to eliminate the need to do 2 queries.

Tell me more about the @@identity.

And just so you know, the backend is MS Access.  I've never seen the query commands you used above and am wondering if Access will handle that.

 

by: pinaldavePosted on 2004-06-18 at 20:30:57ID: 11349680

hum... i never tried to do that with MS Access. It should work with that too.
If not then you can try with above mentioned 2 query. I do not see any other way with MS access.
Regards,
---Pinal

 

by: skibama1Posted on 2004-06-18 at 21:04:54ID: 11349758

OK, here's another approach.  I tried to do this but i received an error:

INSERT INTO table_name (col1, col2)
VALUES ('value 1', 'value 2')
SELECT * FROM table_name


Anybody ever had any success with this order?  It appears that you may not be able to combine a SELECT and INSERT command.

 

by: pinaldavePosted on 2004-06-18 at 21:10:03ID: 11349763

It will not work. You can do select and insert which helps but not serves your purpose.
Above aproach is not possible syntaxt.
Regards,
---Pinal

 

by: mrichmonPosted on 2004-06-21 at 15:24:44ID: 11364457

Please note @@Identity only works with SQL server not all databases

In general a good method is to have a unique identity (like row number)  an autonumber or identity field,etc

Then enclose two separate queries (a insert followed by a select) inside a set of cftransaction tags.

This is the best cross-platform method available

<cftransaction action="begin">
  <cfquery datasource="mydsn">
     INSERT INTO mytable (col1, col2, col3, etc) VALUES (#form.col1#, #form.col2# #form.col3#, #form.etc#)
  </cfquery>
  <cfquery datasource="mydsn" name="GetnewID">
     SELECT MAX(ID) FROM mytable
  </cfquery>
  <cfset NewID = GetnewID.ID>
<cftransaction action="commit">
</cftransaction>

 

by: skibama1Posted on 2004-06-22 at 09:05:53ID: 11370708

Looks like it will work but what does the cftransaction do as opposed as two independent queries?  I guess my biggest concern is two users updating the database at the same moment.

 

by: mrichmonPosted on 2004-06-22 at 09:35:16ID: 11371078

That is what cftransaction does.

It makes it so that everything inside happens at once with no interruption from another user.  Like a lock.

Also if any part inside fails then everything else inside can be rolled back....

 

by: skibama1Posted on 2004-06-22 at 15:12:03ID: 11374449

Ahhhhh.  I get it.  That sounds like an acceptible solution.

20120131-EE-VQP-002

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