Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.databases > #682

Re: joining

Show all headers | View raw

On 8/8/2014 8:54 AM, Lothar Kimmeringer wrote:
> Roedy Green wrote:
>
>> I suspect it might be faster/better to get SQL to join the records for
>> me and present me with one unified record.
>
> If you mean resultset when speaking of record, it is.
>
>> Is that a better approach and if so, what does a query look like given
>> each record has a unique integer key?
>
> Not sure, where the java-related question is, but the statement
> would look like this:
>
>
> select a.name, b.quote from authors a, quotes b
> where a.id = b.id_author

Or,

   select a.name, b.quote from authors a
   join quotes b on a.id = b.id_author

I prefer using JOIN for joins and WHERE clauses for other constraints. 
Also makes it easier to modify the type of JOIN if that becomes an issue.

Back to comp.lang.java.databases | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

joining Roedy Green <see_website@mindprod.com.invalid> - 2014-08-08 05:04 -0700
  Re: joining Lothar Kimmeringer <news200709@kimmeringer.de> - 2014-08-08 15:54 +0200
    Re: joining Chris Riesbeck <Chris.Riesbeck@gmail.com> - 2014-08-08 11:55 -0500
      Re: joining Roedy Green <see_website@mindprod.com.invalid> - 2014-08-08 19:19 -0700
        Re: joining Silvio <silvio@internet.com> - 2014-08-09 07:06 +0200
          Re: joining Roedy Green <see_website@mindprod.com.invalid> - 2014-08-09 02:45 -0700
            Re: joining Silvio <silvio@internet.com> - 2014-08-09 12:16 +0200
              Re: joining Chris Riesbeck <Chris.Riesbeck@gmail.com> - 2014-08-11 12:23 -0500

csiph-web