On 1/25/12 8:42 PM, MB Software Solutions, LLC wrote:
>
> UPDATE MyTable SET MyFactor = 1.23456 WHERE Field1 = 'VALUE' AND Field2
> = "VALUE2"
>
> So by using the IN clause, that nullifies any chance of optimizable tag
> use
What happens if you get rid of the IN clause, like:
WHERE field1 = "
On 1/26/2012 11:21 AM, Stephen Russell wrote:
> I don't live by mySQL like I do SQL Server so my experience is very limited.
>
> The base plan explanation that is a part of mySQL may not give all the
> data that an add on by say Quest might do with say Toad for mySQL?
>
> Doing tests is the only wa
On Thu, Jan 26, 2012 at 9:47 AM, MB Software Solutions, LLC
wrote:
> On 1/26/2012 9:28 AM, Stephen Russell wrote:
>
UPDATE MyTable SET MyFactor = 1.23456 WHERE Field1 = 'VALUE' AND Field2
IN ("VALUE2","VALUE3")
The EXPLAIN says it won't use the combined index. But for simpler
On 1/26/2012 9:28 AM, Stephen Russell wrote:
>>> UPDATE MyTable SET MyFactor = 1.23456 WHERE Field1 = 'VALUE' AND Field2
>>> IN ("VALUE2","VALUE3")
>>>
>>> The EXPLAIN says it won't use the combined index. But for simpler
>>> UPDATEs where it's just one value for Field2 and using an =, it says it
On Wed, Jan 25, 2012 at 10:54 PM, MB Software Solutions, LLC
wrote:
> On 1/25/2012 11:42 PM, MB Software Solutions, LLC wrote:
>> I'm dealing with very large datasets (millions of rows) and so my SQL
>> needs to be "on" more than ever! I'm using MySQL and I'm using EXPLAIN
>> to help me make su
On 1/25/2012 11:42 PM, MB Software Solutions, LLC wrote:
> I'm dealing with very large datasets (millions of rows) and so my SQL
> needs to be "on" more than ever! I'm using MySQL and I'm using EXPLAIN
> to help me make sure my SQL is optimized. I've got several
> fields, two of which are in my
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