1348Query

Saturday, December 12, 2009

Whether can make a cartoon movie clip using flash?

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Posted by IT Help Desk Group at 8:23 AM 0 comments

1347RE: 1346Re: 1344MYSQL IN clause is expensive?

Friday, December 11, 2009

if you need to search on that table yes it will be more expensive, but you are still adding it whether it be in the sub query or explicitly in the join. Out of the two options, the left join should perform better.

When in doubt, write up both queries and put time stamps before and after them. When doing this, just make sure you execute each statement at LEAST five time with different data in each statement - to get a good feel for processing time (otherwise SQL might cache your results and it could be a bad test).

Oh, and make sure you index your tables to increase performance. If you look in the execution plan you will be ablle to see if your joins and queries are scanning the entire table or using your indexes.

> Date: Fri, 11 Dec 2009 01:37:30 -0800
> Subject: 1346Re: 1344MYSQL IN clause is expensive?
> From: natarajanonline@gmail.com
> To: it_help_desk@googlegroups.com
>
> Thanks Dennis
>
> I have one more doubt. Is that join will not be too heavy bcoz
> actually i have shown a sample query, but in real we already have some
> 3-4 tables joined and only for this if we again join then it will be
> expensive. Pls comment on this.
>
> On Dec 10, 7:17 pm, Dennis Benedetto <dbened...@hotmail.com> wrote:
> > yes it is, it is better to do a left join on the table and exclude in the where clause where one of the fields is not null
> >
> >
> >
> >
> >
> > > Date: Wed, 9 Dec 2009 23:20:19 -0800
> > > Subject: 1344MYSQL IN clause is expensive?
> > > From: natarajanonl...@gmail.com
> > > To: it_help_desk@googlegroups.com
> >
> > > Hi,
> >
> > > I would like to use SELECT * from users where userid IN(SELECT userid
> > > from user_book where availability=1)
> >
> > > In the above subquery, it can return 1000 of records. Whether this
> > > operation is expensive?
> >
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> >
> > > Read more..http://groups.google.com/group/it_help_desk
> >
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Posted by IT Help Desk Group at 4:31 AM 0 comments

1346Re: 1344MYSQL IN clause is expensive?

Thanks Dennis

I have one more doubt. Is that join will not be too heavy bcoz
actually i have shown a sample query, but in real we already have some
3-4 tables joined and only for this if we again join then it will be
expensive. Pls comment on this.

On Dec 10, 7:17 pm, Dennis Benedetto <dbened...@hotmail.com> wrote:
> yes it is, it is better to do a left join on the table and exclude in the where clause where one of the fields is not null
>
>
>
>
>
> > Date: Wed, 9 Dec 2009 23:20:19 -0800
> > Subject: 1344MYSQL IN clause is expensive?
> > From: natarajanonl...@gmail.com
> > To: it_help_desk@googlegroups.com
>
> > Hi,
>
> > I would like to use SELECT * from users where userid IN(SELECT userid
> > from user_book where availability=1)
>
> > In the above subquery, it can return 1000 of records. Whether this
> > operation is expensive?
>
> > Dot Net, VB.NET, C#, ADO.Net, ASP.NET, XML, WML, Ajax, SAP, Ruby, Java, SAP, WAP, WML, PHP, MYSQL, ASP, SQL, HTML, DHTML CSS, Flash, Flex, IT Jobs , Freelancer Projects & many more
>
> > Read more..http://groups.google.com/group/it_help_desk
>
> _________________________________________________________________
> Windows Live Hotmail gives you a free,exclusive  gift.http://www.microsoft.com/windows/windowslive/hotmail_bl1/hotmail_bl1....- Hide quoted text -
>
> - Show quoted text -

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Posted by IT Help Desk Group at 1:37 AM 0 comments

1345RE: 1344MYSQL IN clause is expensive?

Thursday, December 10, 2009

yes it is, it is better to do a left join on the table and exclude in the where clause where one of the fields is not null

> Date: Wed, 9 Dec 2009 23:20:19 -0800
> Subject: 1344MYSQL IN clause is expensive?
> From: natarajanonline@gmail.com
> To: it_help_desk@googlegroups.com
>
> Hi,
>
> I would like to use SELECT * from users where userid IN(SELECT userid
> from user_book where availability=1)
>
> In the above subquery, it can return 1000 of records. Whether this
> operation is expensive?
>
> Dot Net, VB.NET, C#, ADO.Net, ASP.NET, XML, WML, Ajax, SAP, Ruby, Java, SAP, WAP, WML, PHP, MYSQL, ASP, SQL, HTML, DHTML CSS, Flash, Flex, IT Jobs , Freelancer Projects & many more
>
> Read more.. http://groups.google.com/group/it_help_desk

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Posted by IT Help Desk Group at 6:17 AM 0 comments

1344MYSQL IN clause is expensive?

Wednesday, December 9, 2009

Hi,

I would like to use SELECT * from users where userid IN(SELECT userid
from user_book where availability=1)

In the above subquery, it can return 1000 of records. Whether this
operation is expensive?

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Posted by IT Help Desk Group at 11:20 PM 0 comments

1343Fast Web Proxy

Friday, November 20, 2009

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Posted by IT Help Desk Group at 5:37 AM 0 comments

1342symfony: cant load data from fixture to database through doctrine:data-load

Thursday, November 19, 2009

hi all ,
i am facing a problem that i have created a project in symfony all
gone well but im stuck at symfony doctrine:data-load when ever i tried
to load data from /fixtures to database.
when i execute the command it shows following message
>> doctrine loading data fixtures from "/ho...fprojects/jobeet/data/fixtures"
>> doctrine Data was successfully loaded

but still there is no data in the database.i have followed all steps
as it is in http://www.symfony-project.org/jobeet/1_2/Doctrine/en/03
but...............

please help me
shahzeb Farooq Chohan
sftranna@yahoo.com

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Posted by IT Help Desk Group at 1:05 AM 0 comments