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What will be the effect of the given SQL Query

 
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morfius9
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Joined: 22 Feb 2006
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PostPosted: Thu Nov 30, 2006 2:18 pm    Post subject: What will be the effect of the given SQL Query
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What will the below query achieve?

Delete from A
Where exists
(Select 'F' from B
where B.date = current date)

WARNING: Do not use 'URGENT' in Title
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guptae

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Joined: 14 Oct 2005
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PostPosted: Thu Nov 30, 2006 2:39 pm    Post subject:
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Hi morfius9,

I think it will delete all the row of table A

Corrections r welcome
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muthuvel

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PostPosted: Thu Nov 30, 2006 8:19 pm    Post subject: Re: What will be the effect of the given SQL Query
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Hi,
In order to delete all the rows of table A the exist should have atleast one row selected from table B.If no row is selected ,then there will be no delete.

Correct me if i am wrong.

Regards,
Muthuvel.
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guptae

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PostPosted: Thu Nov 30, 2006 8:59 pm    Post subject:
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Hi Muthuwel.

Thanks for correcting me
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morfius9
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PostPosted: Mon Dec 04, 2006 1:33 pm    Post subject:
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Thanks Guys, I appreciate the help
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