ChrisM@Work

Forum Replies Created

Viewing 15 posts - 2,491 through 2,505 (of 10,143 total)

RE: optimizing SUM and CASE statements

mattech06 (5/27/2015)
Hi Chris,
what do you mean by actual execution plan?
The statement works - just if the result set (100+) is bigger than normal it takes over a minute whilst under...
^{“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

May 27, 2015 at 8:11 am

#1800933
RE: Change Set clause of Update Statement dynamically based on some condition.

devsql123 (5/27/2015)
Thank you very much guys for this solution...But i made little Typo..so this solution needs little bit update...
Currently my 1st Update statement has Isnull(td.IsPosted, 0) = 0 in WHERE...
^{“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

May 27, 2015 at 7:49 am

#1800909
RE: optimizing SUM and CASE statements

Your CASE expressions don't look correct with multiple AND / OR with no defining parens.
^{“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

May 27, 2015 at 7:49 am

#1800907
RE: optimizing SUM and CASE statements

mattech06 (5/27/2015)
Is there a way of improving the SUM statements below? When I run the query without them it's very fast but with them it takes ages, thanks,
SELECT
r.dbPatID,...
^{“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

May 27, 2015 at 7:44 am

#1800902
RE: Change Set clause of Update Statement dynamically based on some condition.

UPDATE t SET
t.AODYD = CASE WHEN ISNULL(td.IsPosted, 0) = 0 THEN td.ODYD ELSE t.AODYD END,
t.DAODYD = CASE WHEN ISNULL(td.IsPosted, 0) <> 0 THEN td.ODYD ELSE t.DAODYD END
FROM #ReportData...
^{“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

May 27, 2015 at 7:17 am

#1800879
RE: Using string functions on Text

DECLARE @txtMessageText VARCHAR(MAX)
SET @txtMessageText = 'QU - 119480,8377,EX,0810,4300,LT,3,154,1,0,15005,08R,17'
-- NOTE: STUFF() removes the final character from the string. Since the string is
-- reversed, the expression is STUFF(expression,1,1,'')
SELECT...
^{“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

May 27, 2015 at 5:30 am

#1800815
RE: Update query, please help

-- ALWAYS figure out a SELECT to test the update.
SELECT
b.*, a.*
FROM dbo.CardioStaffClinical a
INNER JOIN (
SELECT
[Name (Username):],
Last_Name2 = SUBSTRING([Name (Username):], 1, x.CommaPos-1),
First_Name2 = SUBSTRING([Name (Username):], x.CommaPos+3, 8000)
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

May 27, 2015 at 5:14 am

#1800806
RE: Understanding CAST(INT AS DATETIME)

Food for thought:
SELECT DATEDIFF(millisecond,'20150521','20150522') --86400000 ms in a day
SELECT
RightNow, RightNowNumeric, RightNowDecimalPart, RightNowIntegerPart,
ReconstructedDate = DATEADD(day,RightNowIntegerPart,0),
ReconstructedDateTime = DATEADD(millisecond,86400000*RightNowDecimalPart,DATEADD(day,RightNowIntegerPart,0))
FROM (
SELECT
RightNow,
RightNowNumeric = CAST(RightNow AS NUMERIC(18,12)),
RightNowDecimalPart = CAST(RightNow AS NUMERIC(18,12))%1,
RightNowIntegerPart = CAST(CAST(RightNow...
^{“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

May 21, 2015 at 3:39 am

#1799584
RE: Help with query using outer joins

Maddave (5/20/2015)
Pefect! That's what I need. Thank you so much.
You're welcome. Don't settle for the first attempt though;
Make it work (see above)
Make it fast (see next query)
Make it pretty...
^{“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

May 20, 2015 at 8:25 am

#1799331
RE: Help with query using outer joins

OK, think I've got it now:
SELECT j.*,
s1.Gate1ID, s1.Gate1ProcessId,
s2.Gate2ID, s2.Gate2ProcessId,
s3.Gate3ID, s3.Gate3ProcessId,
s4.Gate4ID, s4.Gate4ProcessId,
s5.Gate5ID, s5.Gate5ProcessId
FROM #Jobs j
LEFT JOIN (
SELECT JobId, n
FROM (
SELECT JobId, cnt...
^{“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

May 20, 2015 at 7:23 am

#1799317
RE: Help with query using outer joins

Or like this?
SELECT j.*,
Gate1ID = (CASE WHEN s.GateId = 1 THEN 1 ELSE NULL END), Gate1ProcessID = (CASE WHEN s.GateId = 1 THEN s.ProcessID ELSE NULL END),
Gate2ID = (CASE...
^{“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

May 20, 2015 at 5:58 am

#1799293
RE: Help with query using outer joins

Like this?
SELECT j.*,
Gate1ID = s1.GateId, Gate1ProcessID = s1.ProcessID,
Gate2ID = s2.GateId, Gate2ProcessID = s2.ProcessID,
Gate3ID = s3.GateId, Gate3ProcessID = s3.ProcessID,
Gate4ID = s4.GateId, Gate4ProcessID = s4.ProcessID,
Gate5ID = s5.GateId, Gate5ProcessID = s5.ProcessID ...
^{“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

May 20, 2015 at 5:44 am

#1799289
RE: implicit conversion failure varchar to numeric using DelimitedSplit8K function

Sean Lange (5/18/2015)
There is something missing here for sure. You stated that you use the DelimitedSplit8K function in your 2000 instance. In the original format it would NOT work in...
^{“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

May 18, 2015 at 10:11 am

#1798695
RE: implicit conversion failure varchar to numeric using DelimitedSplit8K function

Compare the estimated plans for the following statements:
SELECT i.*
FROM @invoice i
WHERE i.org_id in (select item from dbo.DelimitedSplit8K(@org_list,','))
SELECT i.*
FROM @invoice i
INNER JOIN dbo.DelimitedSplit8K(@org_list,',') d ON d.item = i.org_id
In the first plan,...
^{“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

May 18, 2015 at 9:52 am

#1798682
RE: help me i need dynamic sql query for this code to update dynamically every year

maheendra.puttareddy (5/18/2015)
Thank you very much this is really helpful to me
Regards
Maheendra Reddy
You're very welcome, and thank you for the nice feedback.
^{“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

May 18, 2015 at 8:29 am

#1798639

Viewing 15 posts - 2,491 through 2,505 (of 10,143 total)