Jeff Moden

Forum Replies Created

Viewing 15 posts - 48,091 through 48,105 (of 59,095 total)

RE: Date Manipulation

Roger Abram (9/27/2008)
Thanks! I get trying to use the DATEADD function again in the same line.
Roger
... and that will work, also... although it's a bit uglier...
DECLARE @date DATETIME
SELECT @date...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 27, 2008 at 4:48 pm

#878098
RE: Query is slow because of TOP and Order By Count(*)

stephane3d (9/27/2008)
Hi,
I have a log table that saves web visits. And I have this query which is pretty slow :
select top 500 count(1) as nbCount, currentPage as item,
dateadd(dd, DATEDIFF(dd,...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 27, 2008 at 4:45 pm

#878097
RE: Update with multiple conditions - Help needed

As a side bar, I strongly question the value of assigning the NCHAR datatype to a column, like the amount column, that will obviously hold a numeric value.;) I...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 27, 2008 at 1:06 pm

#878090
RE: Update with multiple conditions - Help needed

There is one lightning quick method to do this in a set based fashion that depends on a clustered index. The method is discussed at some great length in...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 27, 2008 at 12:59 pm

#878089
RE: Measuring SQL Performance

For starters, you could try adding the "WITH RECOMPILE" option to the sprocs just to test the water. A better way would be to actually assume that parameter sniffing...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 27, 2008 at 11:12 am

#878086
RE: Help on Update/Query

Thanks... I hate it when that happens... just splits resources and makes it difficult for others to search for a correct answer.
Since the other post has more activity, I'll continue...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 27, 2008 at 7:15 am

#878075
RE: The "Numbers" or "Tally" Table: What it is and how it replaces a loop.

peter (9/25/2008)
In my testing of using the shown tally function on the test input the estimated sub-tree cost of my whole query wend from 0.0131634 to 0.0071212 which is an...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 27, 2008 at 7:07 am

#878074
RE: That's just not right...

rbarryyoung (9/26/2008)
What the IF NOT EXISTS check was intended to do was merely to prevent the error message in the first place. And they did complete that intention.
You could...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 9:46 pm

#878042
RE: That's just not right...

Heh... yep... I understand all of that. But the obvious intention of generating the dynamic SQL is to make it possible to protect the user from accidental overwrites when...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 7:46 pm

#878024
RE: Best way to reindex large tables/indexes

If you want one that's ready made and pretty handy, lookup DBCC SHOWCONTIG and take a look at "Example E"... It even has a place to set a "Max Frag"...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 7:43 pm

#878023
RE: Measuring SQL Performance

Because they clear cache... not just for the proc running, but for everybody. Depending on what's being done, cache is very important for performance by repetative and other code.
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 7:27 pm

#878019
RE: Trigger: Looping though multiple rows in the deleted table?

... and, yes... that "feeling" goes towards delete triggers, as well.
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 7:14 pm

#878018
RE: Trigger: Looping though multiple rows in the deleted table?

ZIP is obviously a reference table. Someday, you may want to delete a ZIP with no impact on other tables. Cascading deletes is a pretty bad idea to...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 7:12 pm

#878017
RE: Hungarian notation convention

The basic table naming convention I try to follow is... what does one row contain? Does it contain a Customer or Customers (answer should be obvious, there)? Same...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 7:03 pm

#878016
RE: Help on Update/Query

Hmmm... alright, Neela... thanks. I've got this. I'm on my way to work... I'll bang it out tonight.
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

September 26, 2008 at 5:51 am

#877570

Viewing 15 posts - 48,091 through 48,105 (of 59,095 total)