Hrm, what version of MySQL? I just ran the query on 5.5.24 and it worked as expected.
- Derek Downey
On Oct 4, 2012, at 9:52 AM, MAS! wrote:
> Hi
>
> I know there'd be a reason, but I can't understand that..
>
> mysql> select @valore:=rand(), @valore, @valore:="ciao", @valore;
> +-------------------+-------------------+-----------------+---------+
> | @valore:=rand() | @valore | @valore:="ciao" | @valore |
> +-------------------+-------------------+-----------------+---------+
> | 0.483624490428366 | 0.483624490428366 | ciao | 0 |
> +-------------------+-------------------+-----------------+---------+
> 1 row in set (0.00 sec)
>
> mysql> select @valore:=rand(), @valore, @valore:="ciao", @valore;
> +-------------------+-------------------+-----------------+---------+
> | @valore:=rand() | @valore | @valore:="ciao" | @valore |
> +-------------------+-------------------+-----------------+---------+
> | 0.747058809499311 | 0.747058809499311 | ciao | ciao |
> +-------------------+-------------------+-----------------+---------+
> 1 row in set (0.00 sec)
>
> why in the first execution the latest value is 0 and not 'ciao'?
> and why in the first 2 columns the variables seems works as expected!?
>
> thank you in advance
>
> bye
> MAS!
>
>
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