Looking at an execution plan today I noticed something I've not seen before. The plan includes a non clustered index seek, followed by a RID lookup on the heap. The output list for the index seek contains the expected "Bmk" column (in this case "Bmk1473"), but also includes "IsBaseRow1475". This isn't a column from the table.
View 3 RepliesIs only one plan is kept for one query in plan cache?
i heard generally hash is created for a query and plan is search with this hash.
I have a person table with 1 billion rows on it, partitioned equally at 10 million rows per partition. The primary key constraint is a composite of an identity column and ssn( char(11) ) with the partitioning column built on the SSN.
This is built on my home grown workstation:
Microsoft 2008 Server 64 bit, Microsoft SQL server 2008 64 bit, Intel 2.66 quad core, 8 gb ram, Os/ raid 1, data on 6 drives hardware/software raid 50, transaction logs on 4 drive raid 10, all drives sata II/ 3gb burst.
I have updated statistics on the table and I have 2 queries that give clustered index seek , one never comes back before I get impatient, the other comes back instantly, and the showplan looks the same for both queries.
SELECT *
FROM Person
WHERE PersonKey > -1 and SSN = '219-09-3987'
AND
SELECT TOP 100 PERCENT *
FROM Person
WHERE PersonKey > -1 and SSN = '219-09-3987'
Incidentally the query with the top 100 percent is the one that returns instantly.
I am puzzled
1) Why the estimated plan looks the same
2) Why a top 100 Percent query is faster than one without it
Timothy A. Vanover
Is it possible to check query execution plan of a store procedure from create script (before creating it)?
Basically the developers want to know how a newly developed procedure will perform in production environment. Now, I don't want to create it in production for just checking the execution plan. However they've provided SQL script for the procedure. Now wondering is there any way to look at the execution plan for this procedure from the script provided?
We have a view with many left joins. The original creators of this view might have been lazy or sloppy, I don't know. I have rewritten the query to proper inner joins where required and also nested left joins.
So rather then the following exemplary fragment
select <many items>
from A
left join B on B.id_A = A.id
left join C on C.id_B = B.idthis now looks like
select <many items>
from A
left join (B
join C on C.id_B = B.id
) on B.id_A = A.id
Compilation time of the original view was 18s, of the new rewritten view 4s. The performance of execution is also better (not counting the compile of course). The results of the query are identical. There are about 30 left joins in the original view.
I can imagine that the optimizer has difficulty with all these left joins. But 14s is quite a big difference. I haven't looked into detail in the execution plans yet. I noticed that in both cases the Reason for Early Termination of Statement Optimization was Time Out.
I am trying to print Companies with less than 100 employees for all dates.Here's my table structure
Create table CompanyEmployeeArchive(
Company varchar(100) not null, Employees int, Dateinserted date)
Insert into CompanyEmployeeArchive values('Microsoft',1001,'2015-01-01')
Insert into CompanyEmployeeArchive values('Microsoft',1050,'2015-02-01')
Insert into CompanyEmployeeArchive values('Microsoft',1600,'2015-03-01')
Insert into CompanyEmployeeArchive values('IBM',10,'2015-01-01')
Insert into CompanyEmployeeArchive values('IBM',80,'2015-02-01')
Insert into CompanyEmployeeArchive values('Apple',90,'2015-01-01')
Insert into CompanyEmployeeArchive values('Apple',900,'2015-02-01')
Insert into CompanyEmployeeArchive values('Apple',1000,'2015-03-01')
I want companies that have employees less than 100 for all dates i.e. Only IBM. Apple has < 100 employees only on one month.Select Company, dateinserted, employees from CompanyEmployeeArchive group by company,dateinserted,employees having employees < 100 order by company, dateinserted this query lists Apple too. How can I change the query so Apple does not show up in the list.
selecting table data in hierarchical XML .
Here is the sample table DDL and data
Declare @continents Table
(
id int identity (1,1)
,continent_id int
,continent_Name varchar(100)
,continent_surface_area varchar(100)
,country_id int
[code]....
I have the following code below where I need to have all of the query results output into a .csv file to use in a VBA macro. The issue I am running into is that the data is not deliminating correctly and my rows are being shifted incorrectly. Any better way of out putting the results into a .csv file with a common delimiter.
-- Declare the variables
DECLARE @CMD VARCHAR(4000),
@DelCMD VARCHAR(4000),
@HEADERCMD VARCHAR(4000),
@Combine VARCHAR(4000),
@Path VARCHAR(4000),
@COLUMNS VARCHAR(4000)
[Code] ...
Output from query (please post in a text editor. The line starting with (only ) should be on line 1 after 20 pks and is shifted to a new line.):
557898^1^9885E25^80082^9.0 CM GLASS FIBER PADS 20PKS
(only 12 pks in stock that will ship today)
^12.00000000^.00000000^18.32000000^219.84000000000^28.30000000
^339.60000000000^9.98000000^35.2650176678445^DR9146322^0^
[Code] ....
I have a dynamic sql which uses Pivot and returns "technically" variable no. of columns.
Is there a way to store the dynamic sql's output in to a temp table? I don't want to create a temp table with the structure of the output and limit no. of columns hence changing the SP every time I get new Pivot column!!
If I use msdb..sp_send_dbmail or save query results as text (using sqlcmd) and include the column headers I get the dashed separator line.
e.g.
custID, name
------, ------
1,bob
2,jamesI would like this
custID, name
1, bob
2 ,james
I found this method [URL] ....
::
sqlcmd -E -S (local) -d myDB -W -w 1024 -s "," -i "SELECT * FROM tblCust" | findstr /V /C:- /B > C: emp.csv
Can the same result be achieved sending as attachment with dbmail?
EXEC msdb..sp_send_dbmail @attach_query_result_as_file = 1I don't want to have to add column names as part of the query
Change the query to return column headers in resultset
SELECT 'CustID' as f1, 'name' as f2
UNION ALL
SELECT CAST(CustID as Varchar(10)), name FROM tblCustand set
msdb..sp_send_dbmail @query_result_header = 0
I'd like to ask how you would get the OUTPUT below from the TABLE below:
TABLE:
id category
1 A
2 C
3 A
4 A
5 B
6 C
7 B
OUTPUT:
category count id's
A 3 1,3,4
B 2 5,7
C 2 2,6
The code would go something like:
Select category, count(*), .... as id's
from TABLE
group by category
I just need to find that .... part.
In sp_create_plan_guide documentation, it's written:
When SQL Server matches the value of statement_text to batch_text and @parameter_name data_type [,...n ], or if @type = 'OBJECT', to the text of the corresponding query inside object_name, the following string elements are not considered:
White space characters (tabs, spaces, carriage returns, or line feeds) inside the string.
Comments (-- or /* */).
Trailing semicolons
On SQL Server 2008 SP3, I created a plan guide for a query. Now, if I execute the query exactly how it was defined in the plan guide, SQL Server match it and use the plan guide to optimize the query.
However, if I add just a space between a column name and an operator in the WHERE clause, the plan guide is ignored. How come it doesn't ignore the extra space, like mentioned in the documentation?
I run a query
select col1, col2, col3, col4
from Table
where col2=5
order by col1
I have a primary key on the column.The execution plan showing the clustered index scan cost 30% & sort cost 70%..When I run the query I got missing index hint on col2 with 95% impact.So I created the non clustered index on col2.The total executed time decreased by around 80ms but I didn't see any Index name that is using in the execution plan.After creating the index also I am seeing same execution plan
The execution plan showing the clustered index scan cost 30% & sort cost 70% but I can see the total time is reducing & Logical reads on that table is reducing.I am sure that index is useful but why there is no change in the execution plan?
Is there a way to leave the graphical 'Include Execution Plan' on by default in SSMS? I don't know how many times I run a long-running query, say to myself, "wow, that took a while; I wonder what the execution plan looks like?" only to realize that I left it turned off. Now I have to turn it on, and wait for the query to run again. I'm guessing there's a setting in the options somewhere to always leave it on, but I'm not sure where
View 2 Replies View RelatedI have query with an expensive Key Lookup on a joined table. The predicate is the column that I'm joining on, and the output list contains two columns from the joined table.
I've created a basic non-clustered index covering the predicate column and include-ing the two output columns. However, the execution plan ignores this, and insists on using the primary key of the joined table to do the expensive key lookup. I've tried adding the included columns to the index directly and there's no change. I've also tried running dbcc freeproccache and no change.
One of my programmers changed their database from full to Simple recovery. Saw that my job that backs up the Full Recovery mode databases failed, so I moved that database to my Simple database backup job plan and removed it from the Full Recovery job. I am unable to remove the db from the Transaction Log task on the Full Plan because when I try to edit that job "Databases with Simple Recovery will be excluded"
My transaction log backups are still failing with the following error: "The statement BACKUP LOG is not allowed while the recovery model is SIMPLE. Use BACKUP DATABASE or change the recovery model using ALTER DATABASE. BACKUP LOG is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.Just want to remove that database so my Full Recovery backup job does not try to back it up.
I have inherited a server on which is a maintenance plan with two subplans on different schedules. In each subplan there are Execute T-SQL tasks with scripts for index rebuilds. Each task is set up with a Completion arrow to the next task and a Failure arrow to a Notify Operator Task. I was asked to add a task for index rebuilds to a specific subplan for a specific database, which is what the other tasks also do. I discovered that my task was failing but the others were fine. No notification was sent about my task failing even though the job is marked in MSDB as a failed job. I have sent a test email using the "Send Test Email..." option when right clicking Database Mail in SSMSand I receive an email so I know Database Mail works.
I set up a test job to model the index job that I can't get notifications from. I have two T-SQL tasks that just select the top row from a small table. The first task has a syntax error that I did so it would fail. I have a failure arrow to a Notify Operator Task and a Completion arrow to another T-SQL task with no syntax error which has a Success arrow to a Notify Operator task. As expected, when I execute this job I receive one failure email and one success email.
The only other troubleshooting step I know to try is to add a Notify Operator task before my failing task. That Notify Operator task will hopefully fire to tell me that the previous step was successful. I am not having problems with the other steps so I was just thinking I would try to get the subplan to send me a success email about one of the steps that has been working fine.
I have below two table and i want ot generate the xml out put as mentioned below.
create table Candidates(eno int,ResumeText varchar(30), Email varchar(30),Active varchar(30),postalcode varchar(30),country int)
insert into Candidates
select 1,'Test','ee@ee.com','Active yes','888888',2
union all
select 2,'Test','ee@ee.com','Active yes','888888',6
[code]...
write a query that lists item, mfg serial number, and inspection date. The caveat is that, where there is more than one record for an item, he only wants item listed once. For example:
PartNumberInspectionDateManufacturerSerialNumber
1A144878/4/2013.1101VAS073-7
3L115931/28/2014009VAS206-1
1/29/2014009VAS206-1
2/21/2014009VAS206-1
7/22/2014009VAS206-1
2A285631/1/2015010115ND9CV02
1A203921/3/2015010315ND9PV45
1/4/2015010315ND9PV45
3/1/2015010315ND9PV45
2A2794310/20/20120103700P003
When I save my output (from a query I ran) to a text file, there seems to be rows of spaces. Is there a way i can just kill off any spaces at the end of my query? Like rtrim or something?
View 9 Replies View RelatedI have to set up archiving of some pretty large tables (125M+ rows) and I'm trying to figure out the best way to do it.
I've been using OUTPUT into, something like this:
delete top (100000) a
output deleted.RecordID
into dbo.RecordsArchive (RecordID)
from dbo.Records
It's difficult to tell if it sub-optimal code or just sheer volume, but any performance penalty using OUTPUT into in this way? or is it advantageous to insert the records to the archive first, and then delete them in two separate operations?
who i can to list the content of all store procedures and funtions in text file ?
View 3 Replies View RelatedThe below data come from table table1. Instead of below result Ex1: I need output similar to the ex2.
Ex1:
CaseNumberStart CaseNumberEndExported
15000013150000131
15000014150000141
15000504150005041
15000505150005051
Ex2:
CaseNumberStart CaseNumberEndExported
15000013150000142
15000504150005052
How to get the result similar to Ex2, instead of Ex1. (ie., case-number is in sequential order then no need to break), And it should suit large dataset, I will finetune, if any performance issue.
When I execute the following command, I get the output truncated to 79 characters, including three dots (as an ellipsis, I suppose).
EXEC master..xp_cmdshell 'powershell.exe "Get-ChildItem D:Databazepaleontologieprilohyverejneg -filter g417*.* -recurse | select Fullname | out-string -width 255"'When I execute the core command directly in Powershell, whether the text or ISE version, it works correctly, with or without the out-string -width command.
Get-ChildItem D:Databazepaleontologieprilohyverejneg -filter g417*.* -recurse | select Fullname | out-string -width 255What does it take to get SSMS to not truncate my output strings?
I have a table Test123 having three column EmpID,AttribName,AttribValue.
run the below query to generate table structure and data.
Create Table Test123(EmpID int,AttribName varchar(50),AttribValue varchar(50))
insert into Test123 values(1,'Name','X')
insert into Test123 values(1,'Age',50)
insert into Test123 values(1,'Salary',1000)
insert into Test123 values(2,'Name','Y')
insert into Test123 values(2,'Age',30)
insert into Test123 values(2,'Salary',2000)
insert into Test123 values(3,'Name','Z')
insert into Test123 values(3,'Age',35)
insert into Test123 values(3,'Salary','One Hundred')
And I want output in below format.
AttributeValueType
=================
AGE | NUMERIC
NAME | ALPHABET
SALARY | ALPHANUMERIC
==================
I have been trying to convert an existing table that used adjacency list model (parentid,childid) to a table that use hierarchy Id type. So early on, I notice my original data does contains multiple roots. So I took a step to create dummy nodes to ensure all nodes fall into a single root structure. Another important fact is that each child node can have multiple parents.
My original source table contains 22461 records, when running the query below step 2 produces explosive number of records around 175,000+ records. I spent hours study the result and couldn't understand what actually causing this, I ran it against small set of test data I didn't seem the issue caused by child with multiple parents.
select * from SourceTable -- produces 22461 records
--step 1: first, get row number of child records in each parent
SELECT ChildID,ParentID, ROW_NUMBER() OVER (PARTITION BY PARENTID ORDER BY PARENTID) as Num
INTO #RelationshipTmp
FROM SourceTable;
[Code] ....
How do I filter a list of Employees where the Sum of "VALIDATED" hours is less than 80? For example.
Here is the flat table
SELECT EMP_NO, hours, IsValidated, rate_type
FROM Pay_Records
WHERE pay_period_id = 2
Order by EMP_NO
Output will be something like this
12345 | 2 |true |REG
12345 | 15 |false |OVR
12345 | 30 |true |OVER
33334 |2| true |REG
Total Validated hours for the Employee 12345 will be 32 NOT 47. How do I list employees who worked less than 80 validated hours. The hours are validated only when it is true.
I written a proc to display the list of Indexes But I needed to print the database where the objects do belong to. How I should write the Dynamic script to add the database Id? I thought to use derived table kind of stuff, but unable to find a solution.
ALTER PROC [dbo].[USP_INDEXCHECK]
AS
DECLARE @sql NVARCHAR(max)
DECLARE @DB VARCHAR(max)
DECLARE databasecursor CURSOR FOR
[Code] .....
i was trying to use the XML read functionality using t-SQL for XML attached.The column is coming with the token names and token-values in XML format and we are using the XML nodes() functionality to read the token names and token value.I am able to read only the parent token names and its values(using the sql attached) and could not be able to get the child token names and its values.how can i acheive the tokenNames with its values with the SQL query.i am attaching both SQL script which i am using and the XML entity.
View 9 Replies View RelatedI am running sql script inside job.But sql is not saving the results in the file which i specified('Unable to open Step output file'). I tried same thing on different server, it works fine.Both are are 2008 R2.Is there any server level setting that i have to look at.On both servers i logged in as sal. Why is it working on server1 ,but not on server2?
View 6 Replies View RelatedOldest Day till I want to Purge[30 days of Old Data] : 03-17-2015
Running Cleanuphistory Procedure On Server:
NO of records are qualifying for deletion:0
Deleted Sysmail MAil Items, Old history: 1
Deleted Sysmail Log Old history: 1
0 history entries purged. <<<<<<< ----------------------- [HOW IT IS COMING ?? ??]
Deleted SQL JOB Old HISTORY: 1
*** END OF PROCEDURE. ***
[Code] .....
Is there anyway,can we find the list of servers by querying at active directory?
View 3 Replies View RelatedWe have more that 500 crystal reports and we would like to find out list of stored procedure used by crystal reports. Can we find out ?
View 4 Replies View Related