sorry for the duplicate message.
just ignore it.
On 2012/03/09, at 10:11, Zheng Li wrote:
>
> what if I have to select all columns every time?
> any difference in performance?
>
> On 2012/02/29, at 4:41, Paul DuBois wrote:
>
>>
>> On Feb 28, 2012, at 9:59 A
what if I have to select all columns every time?
any difference in performance?
On 2012/02/29, at 4:41, Paul DuBois wrote:
>
> On Feb 28, 2012, at 9:59 AM, Zheng Li wrote:
>
>> for example
>> there are 2 tables to save same data
>> table A has 10 columns: a pr
even if I select all columns every time no matter it is Table A or B,
A has better performance?
On 2012/02/29, at 4:41, Paul DuBois wrote:
>
> On Feb 28, 2012, at 9:59 AM, Zheng Li wrote:
>
>> for example
>> there are 2 tables to save same data
>> table A has 10 co
