Comments on: SQL SERVER – Definition, Comparison and Difference between HAVING and WHERE Clause http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/ Personal Notes of Pinal Dave Mon, 13 Feb 2012 15:11:24 +0000 hourly 1 http://wordpress.com/ By: Geeta http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-246112 Tue, 31 Jan 2012 10:10:13 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-246112 thanks a lot

]]> By: ramakrishna http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-236888 Sat, 14 Jan 2012 02:32:13 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-236888 I have table like this

sname gender
ramakrishna F
Sunitha M
Ramudu F
Mahalakshmi F
Revathi M
Renuka M
Raghu F
Rayudu F
Krishnan F
The client entered data male has female and female has male and some rows client entered correctly . How can i Update Male has gender male and female has gender female.

I want result like this
sname gender
ramakrishna M
Sunitha F
Ramudu M
Mahalakshmi F
Revathi F
Renuka F
Raghu M
Rayudu M
Krishnan M

]]> By: ramakrishna http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-236886 Sat, 14 Jan 2012 02:26:16 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-236886 Hi,
I have doubt in sqlserver.
I have one table in my db.
sname percentage
rama 86%
krishna 67%
varma 78
raghava 90%
venkat 87
radha 97
maanasa 89%

How can i get get data who is having percentage in my table?
Very important and I need immediate reply friends
Thanks

]]> By: Tim http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-234700 Tue, 10 Jan 2012 09:10:17 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-234700 That’s an interesting question, Igor. There is plenty of redundancy in SQL syntax.

As regards HAVING, I suppose TOP could be used to replace some HAVING expressions, but only some.

As for WHERE, it depends on the WHERE clause. Some WHERE expressions could be more elegantly (and in some RDBMSs more efficiently) achieved using a JOIN. Most, though, cannot.

]]> By: XAVI RAJ http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-234222 Mon, 09 Jan 2012 13:30:26 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-234222 Nice explanation

]]> By: Igor http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-208007 Wed, 30 Nov 2011 14:20:21 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-208007 Is HAVING redundant?
In other words,
Any query with HAVING clause has its HAVING-less semantic equivalent.
True or false?

Same question with HAVING replaced by WHERE.

]]> By: kalaiselvi http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-198497 Fri, 18 Nov 2011 11:11:04 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-198497 s………this is easily understanding the people

]]> By: Neeraj Kumar http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-194280 Sun, 13 Nov 2011 04:26:51 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-194280 Superb man

]]> By: Gaurav Gupta http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-176048 Fri, 07 Oct 2011 11:00:33 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-176048 Nice article. Please put more light on performance issue in order to use Having and where clause. Also post some business scenarios in order to use Having and where.

]]> By: Tim http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-168750 Fri, 16 Sep 2011 14:31:24 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-168750 Let’s see if I understand this correctly: nothing in the Group By clause can change, before or after aggregation. Therefore, any condition on these fields could be done either in a Where clause or in a Having clause.

Therefore, the only reason to use a Having clause is if I want to put in a condition based on aggregated values. But if I must have a Having clause, I may as well put all of my conditions into it, to save the bother of including both a Where and a Having clause.

Is this correct, or have I missed something?

]]> By: SABARINATHAN http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-164763 Fri, 02 Sep 2011 11:42:28 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-164763 Nice article…i have one doubt can we use HAVING with out GROUP BY clauss.. if possible can you explain in detail, when we need to use where and having.

]]> By: SQL SERVER – Interview Questions and Answers – Frequently Asked Questions – Day 7 of 31 Journey to SQLAuthority http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-146532 Thu, 07 Jul 2011 01:32:06 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-146532 [...] They specify a search condition for a group or an aggregate. But the difference is that HAVING can be used only with the SELECT statement. HAVING is typically used in a GROUP BY clause. When GROUP BY is not used, HAVING behaves like a WHERE clause. Having Clause is basically used only with the GROUP BY function in a query, whereas WHERE Clause is applied to each row before they are part of the GROUP BY function in a query. (Read more here) [...]

]]> By: iMatoria http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-144119 Mon, 27 Jun 2011 06:52:49 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-144119 I knew the difference when i had around 1 year of experience. Probably, you are not interviewing right prospects. :)
Anyways, you are doing great job by maintaining this blog.

]]> By: Imran Mohammed http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-135366 Fri, 20 May 2011 03:16:47 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-135366 @Rahul,

You are getting Multiple Counts because you are grouping using group by Nop_Product.Name.

That means, for every Nop_Product.Name you will see a Count. If you dont want that… you can consider your this whole query as inner query.

Here is an example,

select COUNT(*)
From (
select Count(*) Counts
FROM Nop_Product
INNER JOIN Nop_ProductVariant ON Nop_Product.ProductID = Nop_ProductVariant.ProductID
where ( Nop_Product.Color like ‘%’ + @Keywords + ‘%’
or Nop_Product.Style like ‘%’ + @Keywords + ‘%’
or Nop_Product.Brand like ‘%’ + @Keywords + ‘%’
or Nop_Product.Name like ‘%’ + @Keywords + ‘%’
)
group by Nop_Product.Name
having MAX( Nop_ProductVariant.StockQuantity) > 3.
)A

~ IM.

]]> By: Rahul.k http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-135231 Thu, 19 May 2011 10:55:08 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-135231 select Count(*) FROM Nop_Product INNER JOIN Nop_ProductVariant
ON Nop_Product.ProductID = Nop_ProductVariant.ProductID
where(Nop_Product.Color like ‘%’ + @Keywords + ‘%’ or
Nop_Product.Style like ‘%’ + @Keywords + ‘%’ or
Nop_Product.Brand like ‘%’ + @Keywords + ‘%’ or
Nop_Product.Name like ‘%’ + @Keywords + ‘%’)
group by Nop_Product.Name
having MAX(Nop_ProductVariant.StockQuantity) > 3.

I need to return the count from this query, but it is returning multiple rows and not returning actual count. Can anyone please help me as I need it urgently….

]]> By: lilesh http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-131558 Wed, 27 Apr 2011 14:46:05 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-131558 thanks for ur thoughts

]]> By: Mohit http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-124536 Wed, 23 Mar 2011 09:43:59 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-124536 where is i m lacking ?

–Fetching unmatched record

select ident
from
(
select ident, full_name from position_code_abstract UNION All select position_code_abstract_ident, comments
from position_code_abstract_comment)
Group by ident
having count(*)=1
order by ident

]]> By: kamal http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-123760 Fri, 18 Mar 2011 07:55:09 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-123760 parity sql server meaning

]]> By: Javed Khan http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-117676 Wed, 09 Feb 2011 13:05:39 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-117676 Hi Sir
thanks a Lot for it.
its best for me.

]]> By: Mohtshm http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-115380 Mon, 31 Jan 2011 15:17:34 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-115380 i thought that where execute on retrieved records while having filter before fetching so i think this is a big difference in execution of a query. please guide and correct me

]]> By: Kalyani http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-114090 Tue, 25 Jan 2011 11:51:57 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-114090 Really Helpful article

]]> By: vilas http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-111276 Mon, 17 Jan 2011 06:20:09 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-111276 I would like to say only one sentence

“Very very nice article”

]]> By: ASHOK kUMAR http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-104348 Wed, 08 Dec 2010 21:59:59 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-104348 “HAVING can be used only with the SELECT statement. HAVING is typically used in a GROUP BY clause. When GROUP BY is not used, HAVING behaves like a WHERE clause.”

I found the above statement written by you WRONG. i tried the
following statement and got an error:

select * from customers having customerid=100

Conclusion: We can not use only HAVING in SELECT statement.

]]> By: stan http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-97421 Tue, 02 Nov 2010 18:41:54 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-97421 i was always under impression that you should use WHERE whenever possible, leaving HAVING to those times when where can not get the job done.

From the point of query performance, is WHERE not faster then HAVING (and vise versus)…

can anyone clear this up for me?

]]> By: Ashish http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-90089 Wed, 29 Sep 2010 13:38:56 +0000 http://blog.sqlauthority.com/2007/07/04/sql-server-definition-comparison-and-difference-between-having-and-where-clause/#comment-90089 Thanks all for your response which unfortunately I cant see. Anyway find the answer somewhere else.

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