ChrisM@Work

Forum Replies Created

Viewing 15 posts - 4,996 through 5,010 (of 10,143 total)

RE: multiple a number with time dataType

vahid.arr (3/22/2013)
i want to minus two time(time(7) datattype in sql 2008) datatype and multiple(hour and minute) it to 30.how can i do that?this just work for hour
SELECT datediff(HOUR,[EnterTime],[ExitTime] )*30 from...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 22, 2013 at 5:51 am

#1599726
RE: Are the posted questions getting worse?

Evil Kraig F (3/21/2013)
I am well aware of the bad contractors out there... I'm a contractor myself. I've actually called back to the home company and told them to...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 22, 2013 at 5:38 am

#1599724
RE: Join yeilds different results if used with CTE or a real table

It's down to an optimisation introduced in SQL Server2005 often called "Deferred expression evaluation". Here's a great article by Paul White to add to others already posted.
The original "failing" query...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 22, 2013 at 4:43 am

#1599712
RE: Insert duplicate rows based on number in the column

knakka 14475 (3/21/2013)
Hi ChrisM@Work thank you for the reply.. I have one question in case they are more than 100 quanties what do I need to do.
;WITH
-- Make an inline...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 21, 2013 at 10:27 am

#1599472
RE: Insert duplicate rows based on number in the column

Declare @OrigTab Table(Part varchar(30), qty int)
insert into @OrigTab
select 'X51','3' union
select 'A5','1' union
select '123','2' union
select '054','5'
select * from @OrigTab ORDER BY 1 DESC
;WITH
-- Make an inline tally table (CTE)
E1(N) AS...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 21, 2013 at 10:04 am

#1599463
RE: Are the posted questions getting worse?

Stefan Krzywicki (3/21/2013)
L' Eomot Inversé (3/21/2013)
dwain.c (3/20/2013)
Lynn Pettis (3/20/2013)
I am really wondering how some people manage to get into contracting when they have no idea how to write good, performing...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 21, 2013 at 9:30 am

#1599449
RE: Bushy plan vs left-deep

karthik M (3/21/2013)
I have read about Bushy plan and left deep in some articles. Bushy plan will consume more memory as it runs parallely. is it advisable to write query...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 21, 2013 at 3:02 am

#1599261
RE: Table Join using unique values or where Null = all values

The spec isn't entirely clear; does this generate the results you're expecting to see?
SELECT b.*, a.*, x.*
FROM TableB b
LEFT JOIN TableA a ON b.ColId = a.Area
LEFT JOIN TableA x...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 10:31 am

#1599008
RE: CAST CONVERT doesn't work

DECLARE @SomeDate CHAR(8) = '0'
SELECT
ISDATE(@SomeDate),
CAST(NULLIF(@SomeDate,'0') AS DATE)
-- similar to this handy trick:
DECLARE @numerator INT = 1, @denominator INT = 0
SELECT @numerator/@denominator
--Msg 8134, Level 16, State 1, Line 3
--Divide...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 8:39 am

#1598937
RE: Insertion in table

homebrew01 (3/19/2013)
Chris, although your code is better, I can understand why it's confusing to newer SQL coders. I think it's less intuitive, and not everyone is familiar with some of...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 7:56 am

#1598911
RE: Deadlock on update command

bugg (3/20/2013)
ChrisM@Work (3/20/2013)
Add column [status] to the include list for index IX_sessionid.
As an aside, you appear to have a fair amount of duplication in your indexes.
Thanks for that suggestion.
The...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 7:29 am

#1598885
RE: best optimized query for the requirement

Jeff Moden (3/20/2013)
Shanmuga Raj (3/20/2013)
Thanks.. its working !
can you let me know why you have used
HAVING COUNT(*) = 4
That's to make it so that only those product_ids that...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 7:22 am

#1598882
RE: Deadlock on update command

Add column [status] to the include list for index IX_sessionid.
As an aside, you appear to have a fair amount of duplication in your indexes.
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 6:22 am

#1598857
RE: best optimized query for the requirement

Shanmuga Raj (3/20/2013)
when i run the below query i get error
Conversion failed when converting the varchar value ' | | |0|0|0' to data type int.
...
Ah, that's because I used...
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 4:45 am

#1598824
RE: best optimized query for the requirement

Post the ddl (the CREATE TABLE script) for table fact_sales.
^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

March 20, 2013 at 3:52 am

#1598808

Viewing 15 posts - 4,996 through 5,010 (of 10,143 total)