SQL Server 2014 :: Eliminate Used TempDB To Spill Data
Jul 10, 2015
I've been trying to make the following query more performant by breaking it up into smaller pieces.
SELECT MT.A3+MT.A4 AS A34,MT.A3
-- ,M.*
FROM
Master_TAB M
JOIN (SELECT M.A1,t3.A3,t3.A4,M.A6,M.A2,ROW_NUMBER() OVER (PARTITION BY A1,A6,A3,A4 ORDER BY A5 DESC) AS rownum
[Code] ....
I know that the Spill is caused by the Sort but I can't remove the sort (sort can't be done in front end). My master table had 1.7 million rows and almost 200 columns (bad design? I know but can't be changed as there's too much that would be affected) every row is little over 1KB
Here's my attempt...
-- MASTER_TAB has 1.7 million rows and 50 columns
CREATE TABLE [dbo].[tmp_ABC](
[A1] [varchar](13) NOT NULL,
[A2] [varchar](5) NOT NULL,
[A3] [varchar](4) NOT NULL,
[A4] [varchar](4) NOT NULL,
[A5] [int] NULL
) ON [PRIMARY]
[Code] ...
This is the Query that is causing the Spill (in reality I'm supposed to bring back all 200 columns fro the master table but for debug purposes I limited the columns)
Select c.A3+c.A4 as A34, c.A3, c.A1
-- M.*
from tmp_DEF c
join MASTER_TAB M on M.A1 = c.A1 and M.A2 = c.A2
order by c.A3, C.A4
if I just run the following I get no spill:
Select c.A3+c.A4 as A34, c.A3, c.A1
from tmp_DEF c
order by c.A3, C.A4
as soon as I add the Master table as a Join I get the Spill...
I read many articles, tried many suggested things (creating indexes... clustered, non-clustered) without success. Maybe I'm totally in Left Field and should enhance the performance going another route?
Here with i have attached the execution plan, In that i have tempdb spill over in sort operation. i have created index to sort even it needs temp db spill over. [URL]....
As far as i know sql server iterators spill to tempdb when estimation number of rows less than actual number of rows ? for my example estimation > actual,but sort iterator still spill to temdb.
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Message: Executed as user: NT AUTHORITYSYSTEM. The transaction log for database 'tempdb' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases [SQLSTATE 42000] (Error 9002). The step failed in my sql server agent job i have the above error, this type of errors i got some of multiple jobs.
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U ->Tempdbdata having tempdb.mdf file V->Tempdblog having templog.ldf file
Msg 209, Level 16, State 1, Line 8 Ambiguous column name 'PartNrFabrikant'. Msg 209, Level 16, State 1, Line 8 Ambiguous column name 'omschrijving'. Msg 209, Level 16, State 1, Line 8 Ambiguous column name 'verkoopprijs'. Msg 116, Level 16, State 1, Line 13
Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.
I am trying to write a function to compare the characters between 2 strings and eliminate the similarities to be able to return at the end the number of differences between them.
Having in mind i need the bigger number of differences to be returned also if a character is repeated in one of the 2 words it will be eliminated once because it exist only one time in other string.
I will give an example below to be more clear
--Start declare @string1 as varchar(50)='imos' declare @string2 as varchar(50)='nasos'; WITH n (n) AS ( SELECT 1 FROM (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) n (n)
[Code] ....
The differences in first string from second one are 2 (i,m) while the differences in second string from first one are 3(nas). So the function should return 3 in previous example.
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Is this possible?
This is my current SQL
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Below error occurred during process .
OLE DB provider "OraOLEDB.Oracle" for linked server "<linkedservername>" returned message "". Msg 7346, Level 16, State 2, Line 1 Cannot get the data of the row from the OLE DB provider "OraOLEDB.Oracle" for linked server "<linked server name>".
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Here is what I want to do:
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sp_configure 'show advanced options', 1; GO RECONFIGURE; GO sp_configure 'Ad Hoc Distributed Queries', 1; GO
[code]...
The access database file path is - 'C:SQL ProjectTestDB1001.mdb'.The Table from which I want to import the data is - [Table1001]. but when I run this script, I get this error -9 The OLE DB provider "Microsoft.ACE.OLEDB.12.0" for linked server "MSAccessConnect" reported an error. Authentication failed.
Secondly I need to make 2 more changes to the code posted above.
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Indent Level Key: 1System 2Facility 3Service Line 4Division 5Department
If you notice, each additional row is the child row to its parent above it as long as the Indent Level Key continues to increment. Once we start going back up the structure we essentially have a new Division/Service Line/or Facility depending on how far back we jump on the Indent Level for that next row. Here is some sample data.
--===== If the test table already exists, drop it IF OBJECT_ID('TempDB..#Test_Data','U') IS NOT NULL DROP TABLE #Test_Data
--===== Create the test table with SET ANSI_NULLS ON
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The application has an SQL database locally on my computer.
Will I be able to use SQL server and extract all the guests data from the last year and export it into a file, e.g. A CSV file?
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UserID FirstName LastName 1 Jim Smith 2 Nancy Orr 3 Ken Stephenson
And the structure of the classes table is
UserID ClassID 1 AAA 1 BBB 2 AAA 3 BBB
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So far I've come up with
select UserId, count(*) as MultipleClasses from classes group by UserID having count(*) > 1;
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how would I do something like
Select firtname, lastname from users where Userid=
The output from that initial bit finding users with multiple classes.
