Обсуждение: Tutorial: chapter 5

In 'Joins between classes' in Section 5 of the tutorial we have, in
the first paragraph:

    As an example, say we wish to find all the records that
    are in the  temperature  range  of  other records. In
    effect, we need to compare the temp_lo and temp_hi
    attributes of each EMP instance to the temp_lo and
    temp_hi  attributes of all other EMP instances.

I believe that EMP should read WEATHER, as the example query that
follows joins WEATHER to itself.

EMP is often used in Oracle examples.

Regards,
Graham

Applied.  Thanks.

[ Charset ISO-8859-1 unsupported, converting... ]
> In 'Joins between classes' in Section 5 of the tutorial we have, in
> the first paragraph:
>
>     As an example, say we wish to find all the records that
>     are in the  temperature  range  of  other records. In
>     effect, we need to compare the temp_lo and temp_hi
>     attributes of each EMP instance to the temp_lo and
>     temp_hi  attributes of all other EMP instances.
>
> I believe that EMP should read WEATHER, as the example query that
> follows joins WEATHER to itself.
>
> EMP is often used in Oracle examples.
>
> Regards,
> Graham
>
>


--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026