Which Is More Efficient To Use: Joins Or SubQuery
Aug 28, 2007View 6 Replies
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Self Joins And Subquery
Feb 8, 2001Hello,
I am in the process of debugging a fairly regular SQL statement. I want to simplify the SQL as much as possible for debugging. What I want to know is ... Is it reasonable to replace the return value of a sub query based on a self join. I thought this was legitimate, but it returns a different row count for each.
Here is what I am doing:
SELECT COUNT(DISTINCT(RELATIONSHIPNAME)) AS NUMRELS
--INTO boi.dbo.TBL_PERMGRADETEAMSUMMRELS
FROM CLIENT C, RELATIONSHIP R, PERMISSION P,REL_GRADEHISTORY G, REL_TEAMHISTORY T, TEAM A
WHERE C.RELATIONSHIPID=R.RELATIONSHIPID
AND G.RELATIONSHIPID=R.RELATIONSHIPID
AND C.CLIENTID=P.CLIENTID
AND T.TEAMID=A.TEAMID
AND R.RELATIONSHIPID=T.RELATIONSHIPID
AND A.REPORTINCLUDE = 'Y'
AND P.CHANGEDATE = (SELECT MAX(CHANGEDATE) FROM PERMISSION P1
WHERE P1.CLIENTID=C.CLIENTID
AND P1.CHANGEDATE <= '01/05/01'
AND P1.TYPE=P.TYPE)
I wanted to simplify the first subquery so I ran it independently and it recieved:
2000-11-17 00:00:00.000
Changed SQL:
SELECT COUNT(DISTINCT(RELATIONSHIPNAME)) AS NUMRELS
--INTO boi.dbo.TBL_PERMGRADETEAMSUMMRELS
FROM CLIENT C, RELATIONSHIP R, PERMISSION P,REL_GRADEHISTORY G, REL_TEAMHISTORY T, TEAM A
WHERE C.RELATIONSHIPID=R.RELATIONSHIPID
AND G.RELATIONSHIPID=R.RELATIONSHIPID
AND C.CLIENTID=P.CLIENTID
AND T.TEAMID=A.TEAMID
AND R.RELATIONSHIPID=T.RELATIONSHIPID
AND A.REPORTINCLUDE = 'Y'
AND P.CHANGEDATE = '17-11-2000'
I therefore put '17-11-2000' into the location of the first subquery ( A convert to varchar of the subquery result gave nov 17 2000).
The new query with the hardcoded date returns 9 rows, the older one returned 117.
Can anyone explain please?
Thanks
Lenin.
Transact SQL :: Pull Records From 3 Tables Using Joins Or Subquery?
Sep 14, 2015I have 3 tables.
Table 1:
ID  Name  Description
1  ABc    xyz
2 Â ABC Â Â Â XYZ
Table 2:
RoleID Â Role
1 Â Â Â Â Admin
2 Â Â Â Â QA
Table 3:
ID Â RoleID Â Time
1 Â Â 1 Â Â Â Â 09:14
2 Â Â 1 Â Â Â Â 09:15
1 Â Â 2 Â Â Â Â 09:16
Now I want all the records which belongs to RoleID 1 but if same ID is belongs to RoleID 2 than i don't want that ID.From above tables ID 1 belongs to RoleID 1 and 2 so i don't want ID 1.
Subquery Returned More Than 1 Value. This Is Not Permitted When The Subquery Follows =, !=, &<, &<= , &>, &>= Or When The Subquery Is Used As An Expression.
Apr 26, 2008hello friends.. I am newbie for sql server...I having a problem when executing this procedure .... ALTER PROCEDURE [dbo].[spgetvalues] @Uid intASBEGIN SET NOCOUNT ON; select DATEPART(year, c.fy)as fy, (select contribeamount from wh_contribute where and contribename like 'Retire-Plan B-1% JRF' ) as survivorship, (select contribeamount from wh_contribute where and contribename like 'Gross Earnings' and ) as ytdgross, (select contribeamount from wh_contribute where and contribename like 'Retire-Plan B-1.5% JRP') as totalcontrib, from wh_contribute c where c.uid=@Uid Order by fy Asc .....what is the wrong here?? " Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression."please reply asap...
View 1 Replies View RelatedSubquery Returned More Than 1 Value. This Is Not Permitted When The Subquery Follows =, !=, &<, &<= , &>, &>= Or When The Subquery Is Used As An Expression.
Jul 20, 2005I am getting 2 resultsets depending on conditon, In the secondconditon i am getting the above error could anyone help me..........CREATE proc sp_count_AllNewsPapers@CustomerId intasdeclare @NewsId intset @NewsId = (select NewsDelId from NewsDelivery whereCustomerId=@CustomerId )if not exists(select CustomerId from NewsDelivery whereNewsPapersId=@NewsId)beginselect count( NewsPapersId) from NewsPapersendif exists(select CustomerId from NewsDelivery whereNewsPapersId=@NewsId)beginselect count(NewsDelId) from NewsDelivery whereCustomerid=@CustomeridendGO
View 3 Replies View RelatedSubquery Returned More Than 1 Value. This Is Not Permitted When The Subquery Follows =, !=, &&<, &&<= , &&>, &&>= Or When The Subquery I
Mar 6, 2008I am getting an error as
Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
while running the following query.
SELECT DISTINCT EmployeeDetails.FirstName+' '+EmployeeDetails.LastName AS EmpName,
LUP_FIX_DeptDetails.DeptName AS CurrentDepartment,
LUP_FIX_DesigDetails.DesigName AS CurrentDesignation,
LUP_FIX_ProjectDetails.ProjectName AS CurrentProject,
ManagerName=(SELECT E.FirstName+' '+E.LastName
FROM EmployeeDetails E
INNER JOIN LUP_EmpProject
ON E.Empid=LUP_EmpProject.Empid
INNER JOIN LUP_FIX_ProjectDetails
ON LUP_EmpProject.Projectid = LUP_FIX_ProjectDetails.Projectid
WHERE LUP_FIX_ProjectDetails.Managerid = E.Empid)
FROM EmployeeDetails
INNER JOIN LUP_EmpDepartment
ON EmployeeDetails.Empid=LUP_EmpDepartment.Empid
INNER JOIN LUP_FIX_DeptDetails
ON LUP_EmpDepartment.Deptid=LUP_FIX_DeptDetails.Deptid
AND LUP_EmpDepartment.Date=(SELECT TOP 1 LUP_EmpDepartment.Date
FROM LUP_EmpDepartment
WHERE EmployeeDetails.Empid=LUP_EmpDepartment.Empid
ORDER BY LUP_EmpDepartment.Date DESC)
INNER JOIN LUP_EmpDesignation
ON EmployeeDetails.Empid=LUP_EmpDesignation.Empid
INNER JOIN LUP_FIX_DesigDetails
ON LUP_EmpDesignation.Desigid=LUP_FIX_DesigDetails.Desigid
AND LUP_EmpDesignation.Date=(SELECT TOP 1 LUP_EmpDesignation.Date
FROM LUP_EmpDesignation
WHERE EmployeeDetails.Empid=LUP_EmpDesignation.Empid
ORDER BY LUP_EmpDesignation.Date DESC)
INNER JOIN LUP_EmpProject
ON EmployeeDetails.Empid=LUP_EmpProject.Empid
AND LUP_EmpProject.StartDate=(SELECT TOP 1 LUP_EmpProject.StartDate
FROM LUP_EmpProject
WHERE EmployeeDetails.Empid=LUP_EmpProject.Empid
ORDER BY LUP_EmpProject.StartDate DESC)
INNER JOIN LUP_FIX_ProjectDetails
ON LUP_EmpProject.Projectid=LUP_FIX_ProjectDetails.Projectid
WHERE EmployeeDetails.Empid=1
PLEASE HELP.................
Subquery Returned More Than 1 Value. This Is Not Permitted When The Subquery Follows =, !=, &&<, &&<= , &&>, &&>= Or When The Subquery I
May 14, 2008Hi,
I've running the below query for months ans suddenly today started getting the following error :"Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression."
Any ideas as to why??
SELECT t0.DocNum, t0.Status, t0.ItemCode, t0.Warehouse, t0.OriginNum, t0.U_SOLineNo, ORDR.NumAtCard, ORDR.CardCode, OITM_1.U_Cultivar,
RDR1.U_Variety,
(SELECT OITM.U_Variety
FROM OWOR INNER JOIN
WOR1 ON OWOR.DocEntry = WOR1.DocEntry INNER JOIN
OITM INNER JOIN
OITB ON OITM.ItmsGrpCod = OITB.ItmsGrpCod ON WOR1.ItemCode = OITM.ItemCode
WHERE (OITB.ItmsGrpNam = 'Basic Fruit') AND (OWOR.DocNum = t0.DocNum)) AS Expr1, OITM_1.U_Organisation, OITM_1.U_Commodity,
OITM_1.U_Pack, OITM_1.U_Grade, RDR1.U_SizeCount, OITM_1.U_InvCode, OITM_1.U_Brand, OITM_1.U_PalleBase, OITM_1.U_Crt_Pallet,
OITM_1.U_LabelType, RDR1.U_DEPOT, OITM_1.U_PLU, RDR1.U_Trgt_Mrkt, RDR1.U_Wrap_Type, ORDR.U_SCCode
FROM OWOR AS t0 INNER JOIN
ORDR ON t0.OriginNum = ORDR.DocNum INNER JOIN
RDR1 ON ORDR.DocEntry = RDR1.DocEntry AND t0.U_SOLineNo - 1 = RDR1.LineNum INNER JOIN
OITM AS OITM_1 ON t0.ItemCode = OITM_1.ItemCode
WHERE (t0.Status <> 'L')
Thanks
Jacquues
Subquery Returned More Than 1 Value But Work FINE (field_xxx=subquery)
Jul 19, 2007Hi guys,
A have a problem that I need understand.... I have 2 server with the same configuration...
SERVER01:
-----------------------------------------------------
Microsoft SQL Server 2000 - 8.00.2191 (Intel IA-64)
Mar 27 2006 11:51:52
Copyright (c) 1988-2003 Microsoft Corporation
Enterprise Edition (64-bit) on Windows NT 5.2 (Build 3790: Service Pack 1)
sp_dboption 'BB_XXXXX'
The following options are set:
-----------------------------------
trunc. log on chkpt.
auto create statistics
auto update statistics
********************************
SERVER02:
-----------------------------------------------------
Microsoft SQL Server 2000 - 8.00.2191 (Intel IA-64)
Mar 27 2006 11:51:52
Copyright (c) 1988-2003 Microsoft Corporation
Enterprise Edition (64-bit) on Windows NT 5.2 (Build 3790: Service Pack 1)
sp_dboption 'BB_XXXXX'
The following options are set:
-----------------------------------
trunc. log on chkpt.
auto create statistics
auto update statistics
OK, the problem is that if a run the below query in server01, i get error 512:
Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
But, if run the same query in the server02, the query work fine -.
I know that I can use IN, EXISTS, TOP, etc ... but I need understand this behavior.
Any idea WHY?
SELECT dbo.opf_saldo_ctb_opc_flx.dt_saldo,
dbo.opf_saldo_ctb_opc_flx.cd_indice_opf,
dbo.opf_saldo_ctb_opc_flx.cd_classificacao,
dbo.opf_movimento_operacao.ds_tipo_transacao ds_tipo_transacao_movimento ,
dbo.opf_header_operacao.ds_tipo_transacao ds_tipo_transacao_header,
'SD' ds_status_operacao,
dbo.opf_header_operacao.ds_tipo_opcao ,
dbo.opf_header_operacao.id_empresa,
dbo.opf_saldo_ctb_opc_flx.ic_empresa_cliente,
0 vl_entrada_compra_ctro ,0 vl_entrada_compra_premio,
0 vl_entrada_venda_ctro , 0 vl_entrada_venda_premio,
0 vl_saida_compra_ctro, 0 vl_saida_compra_premio,
0 vl_saida_venda_ctro, 0 vl_saida_venda_premio,
0 vl_lucro , 0 vl_prejuizo, 0 vl_naoexec_contrato,
0 vl_naoexec_premio,
sum(dbo.opf_saldo_ctb_opc_flx.vl_aprop_ganho) vl_aprop_ganho,
sum(dbo.opf_saldo_ctb_opc_flx.vl_aprop_perda) vl_aprop_perda,
sum(dbo.opf_saldo_ctb_opc_flx.vl_rever_ganho) vl_rever_ganho,
sum(dbo.opf_saldo_ctb_opc_flx.vl_rever_perda) vl_rever_perda,
sum(dbo.opf_saldo_ctb_opc_flx.vl_irrf) vl_irrf
FROM dbo.opf_saldo_ctb_opc_flx,
dbo.opf_header_operacao ,
dbo.opf_movimento_operacao
WHERE dbo.opf_saldo_ctb_opc_flx.dt_saldo = '6-29-2007 0:0:0.000'
and ( dbo.opf_header_operacao.no_contrato = dbo.opf_saldo_ctb_opc_flx.no_contrato )
and ( dbo.opf_header_operacao.no_contrato = dbo.opf_movimento_operacao.no_contrato )
and ( dbo.opf_movimento_operacao.dt_pregao = (select (o.dt_pregao) from dbo.opf_movimento_operacao o
where o.no_contrato = dbo.opf_movimento_operacao.no_contrato and o.dt_pregao <='6-28-2007 0:0:0.000' ) )
and (dbo.opf_saldo_ctb_opc_flx.ic_tipo_saldo = 'S')
group by dbo.opf_saldo_ctb_opc_flx.dt_saldo,
dbo.opf_saldo_ctb_opc_flx.cd_indice_opf,
dbo.opf_saldo_ctb_opc_flx.cd_classificacao,
dbo.opf_movimento_operacao.ds_tipo_transacao,
dbo.opf_header_operacao.ds_tipo_transacao ,
ds_status_operacao,
dbo.opf_header_operacao.ds_tipo_opcao ,
dbo.opf_header_operacao.id_empresa,
dbo.opf_saldo_ctb_opc_flx.ic_empresa_cliente
Thanks
Nilton Pinheiro
Joins On Views That Are Formed With Outer Joins
Nov 3, 2000We find that a delete command on a table where the rows to be deleted involve an inner join between the table and a view formed with an outer join sometimes works, sometimes gives error 625.
If the delete is recoded to use the join key word instead of the = sign
then it alway gives error 4425.
625 21 0 Could not retrieve row from logical page %S_PGID by RID because the entry in the offset table (%d) for that RID (%d) is less than or equal to 0. 1033
4425 16 0 Cannot specify outer join operators in a query containing joined tables. View '%.*ls' contains outer join operators.
The delete with a correleted sub query instead of a join works.
Error 4425 text would imply that joins with view formed by outer joins should be avoided.
Any ideas on the principles involved here.
Adding Product Of A Subquery To A Subquery Fails?
Jul 6, 2014I am trying to add the results of both of these queries together:
The purpose of the first query is to find the number of nulls in the TimeZone column.
Query 1:
SELECT COUNT(*) - COUNT (TimeZone)
FROM tablename
The purpose of the second query is to find results in the AAST, AST, etc timezones.
Query 2:
SELECT COUNT (TimeZone)
FROM tablename
WHERE TimeZone NOT IN ('EST', 'MST', 'PST', 'CST')
Note: both queries produce a whole number with no decimals. Ran individually both queries produce accurate results. However, what I would like is one query which produced a single INT by adding both results together. For example, if Query 1 results to 5 and query 2 results to 10, I would like to see a single result of 15 as the output.
What I came up with (from research) is:
SELECT ((SELECT COUNT(*) - COUNT (TimeZone)
FROM tablename) + (SELECT COUNT (TimeZone)
FROM tablename
WHERE TimeZone NOT IN ('EST', 'MST', 'PST', 'CST'))
I get a msq 102, level 15, state 1 error.
I also tried
SELECT ((SELECT COUNT(*) - COUNT (TimeZone)
FROM tablename) + (SELECT COUNT (TimeZone)
FROM tablename
WHERE TimeZone NOT IN ('EST', 'MST', 'PST', 'CST')) as IVR_HI_n_AK_results
but I still get an error. For the exact details see:
[URL]
NOTE: the table in query 1 and query 2 are the same table. I am using T-SQL in SQL Server Management Studio 2008.
JOINS To Sub-Queries -vs- JOINS To Tables
Aug 11, 2005SQL Server 2000Howdy All.Is it going to be faster to join several tables together and thenselect what I need from the set or is it more efficient to select onlythose columns I need in each of the tables and then join them together?The joins are all Integer primary keys and the tables are all about thesame.I need the fastest most efficient method to extract the data as thisquery is one of the most used in the system.Thanks,Craig
View 3 Replies View RelatedMost Efficient DataSource?
Aug 3, 2007Hi there,
I'm using a Repeater at the moment which is bound to a SQLDataSource. I expect much load on that Website, should I choose another DataSource? Which other DataSource is better if it's about Performance?
I read some stuff about the SQLAdapter and a DataSet.. is that better in performance? Why is it better?
What about LinQ?
Thanks a lot for any clarification.
More Efficient Code
Dec 13, 2007Hi all, I have the code listed below and feel that it could be run much more efficiently. I run this same code for attrib2, 3, description, etc for a total of 21, so on each postback I am running a total of 21 different connections, i have listed only 3 of them here for the general idea. I run this same code for update and for insert, so 21 times for each of them as well. In fact if someone is adding a customer, after they hit the new customer button, it first runs 21 inserts of blanks for each field, then runs 21 updates for anything they put in fields, on the same records. This is running too slow... any ideas on how I can combine these?? We have 21 different entries for EVERY customer. The Pf_property does not change, it is 21 different set entries, the only one that changes is the Pf_Value.
Try Dim queryString As String = "select Pf_Value from CustomerPOFlexField where [Pf_property] = 'Attrib1' and [Pf_CustomerNo] = @CustomerNo" Dim connection As New SqlClient.SqlConnection("connectionstring") Dim command As SqlClient.SqlCommand = New SqlClient.SqlCommand(queryString, connection) command.Parameters.AddWithValue("@CustomerNo", DropDownlist1.SelectedValue) Dim reader As SqlClient.SqlDataReader command.Connection.Open() reader = command.ExecuteReader reader.Read() TextBox2.Text = Convert.ToString(reader("Pf_Value")) command.Connection.Close() Catch ex As SystemException Response.Write(ex.ToString) End Try
Try Dim queryString As String = "select Pf_Value from CustomerPOFlexField where [Pf_property] = 'Attrib1Regex' and [Pf_CustomerNo] = @CustomerNo" Dim connection As New SqlClient.SqlConnection("connectionstring") Dim command As SqlClient.SqlCommand = New SqlClient.SqlCommand(queryString, connection) command.Parameters.AddWithValue("@CustomerNo", DropDownlist1.SelectedValue) Dim reader As SqlClient.SqlDataReader command.Connection.Open() reader = command.ExecuteReader reader.Read() TextBox5.Text = Convert.ToString(reader("Pf_Value")) command.Connection.Close() Catch ex As SystemException Response.Write(ex.ToString) End Try
Try Dim queryString As String = "select Pf_Value from CustomerPOFlexField where [Pf_property] = 'Attrib1ValMessage' and [Pf_CustomerNo] = @CustomerNo" Dim connection As New SqlClient.SqlConnection("connectionstring") Dim command As SqlClient.SqlCommand = New SqlClient.SqlCommand(queryString, connection) command.Parameters.AddWithValue("@CustomerNo", DropDownlist1.SelectedValue) Dim reader As SqlClient.SqlDataReader command.Connection.Open() reader = command.ExecuteReader reader.Read() TextBox6.Text = Convert.ToString(reader("Pf_Value")) command.Connection.Close() Catch ex As SystemException Response.Write(ex.ToString) End Try
Thanks,
Randy
Which Query Is More Efficient?
Apr 1, 2008what's the difference, if I use SQLDataReader at code level, making a query of that retrieves 500 rows and 2 columns, and making a query that retrieves 2 rows and 500 columns?
View 6 Replies View RelatedMost Efficient Way To Do This Select....
Feb 12, 2002I have a table that has the following...
ID Status Type Check_Num Issued IssueTime Paid PaidTime
-----------------------------------------------------------------
1 I <null> 10 10.00 2/1/02
2 E IDA 10 <null> <null> 10.01 2/3/02
3 E CAP 10 <null> <null> 10.00 2/4/02
4 E PNI 11 <null> <null> 15.00 2/6/02
I want to return the Check_Num,Type, Paid, and Max(PaidTime) from this...
Example:
Check_Num Type Paid Time
---------------------------
10 CAP 10.00 2/4/02
11 PNI 15.00 2/6/02
Any assistance will be greatly appreciated.
Thanks,
Brian
In-efficient SQL Code
Sep 7, 2000Hey people
I'd be really grateful if someone can help me with this. Could someone explain the following:
If the following code is executed, it runs instantly:
declare @SellItemID numeric (8,0)
select @SellItemID = 5296979
SELECT distinct s.sell_itm_id
FROM stor_sell_itm s
WHERE (s.sell_itm_id = @SellItemID )
However, if I use this WHERE clause instead -
WHERE (@SellItemID = 0 OR s.sell_itm_id = @SellItemID)
- it takes 70 micro seconds. When I join a few more tables into the statement, the difference is 4 seconds!
This is an example of a technique I'm using in loads of places - I only want the statement to return all records if the filter is zero, otherwise the matching record only. I think that by using checking the value of the variable in the WHERE clause, a table scan is used instead of an index. This seems nonsensical since the variable is effectively a constant. Wrapping the entire select statement with an IF or CASE works, but when I've got 10 filters I'd have to 100 select statements.
I DON'T GET IT!! There must be a simple answer, HELP!!
Jo
PS this problem seems to occur both in 6.5 and 7.0
Need Efficient Query
Jun 12, 2008This query is giving me very slow search .What could be the efficient way
SELECT (
SELECT COUNT(applicationID) FROM Vw_rptBranchOffice
WHERE ( statusDate between '2008-03-13 16:12:11.513' AND '2008-05-30 00:00:00.000'
AND SearchString like '%del%')) AS
totalNO,ApplicationID,SearchString,StudentName,IntakeID,CounslrStatusDate
FROM Vw_rptBranchOffice
WHERE statusDate between '2008-03-13 16:12:11.513' AND '2008-05-30 00:00:00.000' AND
SearchString like '%del%'
More Efficient Way Than You Have Published
Dec 8, 2004Sumanesh writes "Recently I read one article “Converting Multiple Rows into a CSV string�
(http://www.sqlteam.com/item.asp?ItemID=256)
I have found one easy and more efficient way to achieve the same thing.
First I have a table called test with 2 columns (ID and Data)
And some data inserted into it.
CREATE FUNCTION [dbo].CombineData(@ID SMALLINT)
RETURNS VARCHAR(2000)
AS
BEGIN
DECLARE @Data VARCHAR(2000)
SET @Data = ''
SELECT @Data = @Data + Data + ',' FROM Test WHERE ID = @ID
RETURN LEFT(@Data,LEN(@Data)-1)
END
GO
Then used a simple select query to achieve the same
SELECT DISTINCT ID, [dbo].CombineData(ID) FROM Test
Which achieved the same thing without using any temporary tables and Cursors. I am sure that you will accept that this is more efficient than the one that has been published.
Thanks
Sumanesh"
Efficient SQL Backup?
Apr 19, 2006Hi all,I am having issues of efficiency of backing up data from one SQL database to another.The two servers in questions are on different networks , behinddifferent firewalls. We have MS SQL 2000.On the source data i run a job with the following steps:1> take trans backup every 4 hrs2> ftp to the remote server3> if ftp fails , disable the whole jobOn the target server I run a job which does the following1> restore the trans backup with NORECOVERY.If the job fails at target. I will have to go through the whole processof doing a complete backup of the source , restoring it at the otherens and then starting trans-backup again.Also, if we do a failover to the target server, then when we roll backto the source server again we have to da a back-up of the target andrestore it on the source server.Is ther a more efficent way of doing this??
View 3 Replies View RelatedMore Efficient - Exists Or In
Jul 20, 2005Which is more efficient:Select * from table1 where id in (select id from table2)orSelect * from table1 where exists(select * from table2 wheretable2.id=table1.id)
View 8 Replies View RelatedEfficient Select
Jul 20, 2005It seems I should be able to do 1 select and both return thatrecordset and be able to set a variable from that recordset.eg.Declare @refid intSelect t.* from mytable as t --return the recordsetSet @refid = t.refidthe above doesn't work-how can I do it without making a second trip tothe database?Thanks,Rick
View 3 Replies View RelatedEfficient Way Than IN Statement
Aug 21, 2006I have two tables JDECurrencyRates and JDE Currency Conversion
I want to insert all the records all the records from JDECurrencyRates to JDECurrencyConversion that does not exists in JDECurrencyConversion table. For matching I am to use three keys i.e. FromCurrency, TO Currency and Effdate
To achieve this task i wrote the following query
INSERT INTO PresentationEurope.dbo.JDECurrencyConversion(Date,FromCurrency,FromCurrencyDesc,
ToCurrency, ToCurrencyDesc, EffDate, FromExchRate, ToExchRate,CreationDatetime
,ChangeDatetime)
(SELECT effdate as date, FromCurrency, FromCurrencyDesc, ToCurrency, ToCurrencyDesc, EffDate,
FromExchRate, ToExchRate, GETDATE(),GETDATE() FROM MAINTENANCE.DBO.JDECURRENCYRATES
WHERE FROMCURRENCY NOT IN (SELECT FromCurrency FROM PRESENTATIONEUROPE.DBO.JDECURRENCYCONVERSION)
OR TOCURRENCY NOT IN (SELECT TOCURRENCY FROM PRESENTATIONEUROPE.DBO.JDECURRENCYCONVERSION)
OR EFFDATE NOT IN (SELECT EFFDATE FROM PRESENTATIONEUROPE.DBO.JDECURRENCYCONVERSION))
Can any one suggest me the better way to accomplish this task or this query is OK (or efficient enough)
Ansi Joins Vs. SQL Joins
Oct 12, 1999Hi,
Why is it that SQL joins (*=) run a little faster as opposed to ANSI joins(LEFT JOIN...)? Aren't they supposed to be almost identical?
The issue is this: we are promoting using ANSI syntax for the obvious reason (future versions of SQL Server may not support SQL Server syntax; portability, etc.)
However, the problem is the speed. What have others done about this? Do you use ANSI syntax or SQL syntax? HOw true is it that future SQL Server versions may discontinue support for the '*=" and "=*' join operators.
Angel
UNION ALL, Joins And No Joins
Feb 29, 2008I have four tables which I want to return results for an advanced search function, the tables contain different data, but can be quite easily joined,
Table A Contains a Main Image, this image is displayed in the results
Table B Contains an Icon, this image is displayed in the results
Table C doesn't have an image in it but has a child table with a number of images associated to the table, in the UNION ALL statement I would Like to do a Join to get say the top Image from this child and print it for the row associated with table C.
Select title, description, image from tableA
UNION ALL
Select title, description, icon as image from tableB
UNION ALL
title, description, ( inner Join SELECT top(1)
from imageTableC where imagetableC.FK = tableC.PK)
as image from tableC
Could someone show me the syntax to do this, I have all the information printing to the screen, bar this table C image.
Most Efficient Way Of Returning Data
Feb 22, 2007I have a number of tables, and I need to create a summary of the data.Now I have two choices. I could create a stored procedure that creates a temp table with the filters applied. This would require 12 selects for each year (we have 3 years of data so far). This means 36 selects so far that fill a temp table.The second choice is to create a table with the required columns and rows. As I am esspecially cross-joining 4 tables, the table would have about 10 x 10 x 12 x A rows, where A is a variable that will grow quickly. I can then keep this table up-to-date using triggers for each insert. Then all I need to do is use an aggregate funtion on the relevant filter.My question is, which is more efficient. Creating a stored procedure that creates the table dynamically, or have a table with thousands of rows and using an aggregate function on these.PS I am using SQL Server 2000Jag
View 1 Replies View RelatedIs There A More Efficient Way To Perform This Process?
Dec 11, 2007My e-commerce site is currently running the following process when items are shipped from the manufacturer:1. Manufacturer sends a 2-column CSV to the retailer containing an Order Number and its Shipping Tracking Number.2. Through the web admin panel I've built, a retail staff member uploads the CSV to the server.3. In code, the CSV is parsed. The tracking number is saved to the database attached to the Order Number.4. After a tracking # is saved, each item in that order has its status updated to Shipped.5. The customer is sent an email using ASPEmail from Persits which contains their tracking #.The process seems to work without a problem so long as the CSV contains roughly 50 tracking #'s or so. The retailer has gotten insanely busy and wants to upload 3 or 4 thousand tracking #'s in a single CSV, but the process times out, even with large server timeout values being set in code. Is there a way to streamline the process to make this work more efficiently? I can provide the code if that helps.
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Dec 11, 2007I have a table that has a date and time column. I need to do a search on the table by days and will eventually need to do it by hours as well.
I wanted to ask the question that will the performance get better if I create two additional columns one stateing the "Day of Week" and the other stating " Hour of Week". These will have numerical values prepopulated i.e. for Saturday 7, sunday 1, Monday 2 etc etc etc. And for the time , I will have 1 for 1pm-159pm 2 for 2-2:59pm pm 3 for 3-3:59pm etc etc etc
The total number of rows in the table could total half a million, with filtered to by weekf of day may be reduce to being 80,000 or so.
Is the above criteria to add two numeric columns to the table and putting indexes on those two numeric fields is a good solution? and efficinet or just using the datepart functionality with the actual date column and using the week of day and time parameters as the case may be.
Thanks fro your help.
Thanks
More Efficient Updates Of SQL Server
Feb 6, 2001If I have 5000 rows to update with different values based upon the primary key, is there a better way to do it than 5000 separate update statements?
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Sep 25, 2000I have a function which works that converts getdate() to a 8 character string. I have tried others ways but this one works OK. However the more I look at it the more I think a more efficient way has to exist. Any ideas greatly appreciated. Here is my approach
declare @order_date char(8), @year char(4), @month char(2), @day char(2)
set @year = cast(datepart(yyyy,getdate()) as char(4))
if datepart(dd,getdate())<10 set @day = '0'+cast(datepart(dd,getdate()) as char(2)) else set @day = cast(datepart(dd,getdate()) as char(2))
if datepart(mm,getdate())<10 set @month = '0'+cast(datepart(mm,getdate()) as char(2)) else set @month = cast(datepart(mm,getdate()) as char(2))
set @order_date = @year + @month + @day select @order_date
Efficient JOIN Query
Mar 15, 2006Please help me with the efficient JOIN query to bring the below result :
create table pk1(col1 int)
create table pk2(col1 int)
create table pk3(col1 int)
create table fk(col1 int, col2 int NOT NULL, col3 int, col4 int)
insert into pk1 values(1)
insert into pk1 values(2)
insert into pk1 values(3)
insert into pk2 values(1)
insert into pk2 values(2)
insert into pk2 values(3)
insert into pk3 values(1)
insert into pk3 values(2)
insert into pk3 values(3)
insert into fk values(1, 1, null, 10)
insert into fk values(null, 1, 1, 20)
insert into fk values(1, 1,null, 30)
insert into fk values(1, 1, null, 40)
insert into fk values(1, 1, 1, 70)
insert into fk values(2, 3, 1, 60)
insert into fk values(1, 1, 1, 100)
insert into fk values(2, 2, 3, 80)
insert into fk values(null, 1, 2, 50)
insert into fk values(null, 1, 4, 150)
insert into fk values(5, 1, 2, 250)
insert into fk values(6, 7, 8, 350)
insert into fk values(10, 1, null, 450)
Below query will give the result :
select fk.* from fk inner join pk1 on pk1.col1 = fk.col1 inner join pk2 on pk2.col1 = fk.col2 inner join pk3 on pk3.col1 = fk.col3
Result :
+------+------+------+------+
| col1 | col2 | col3 | col4 |
+------+------+------+------+
| 1 | 1 | 1 | 70 |
| 2 | 3 | 1 | 60 |
| 1 | 1 | 1 | 100 |
| 2 | 2 | 3 | 80 |
+------+------+------+------+
But I require also the NULL values in col1 and col3
Hence doing the below :
select distinct fk.* from fk inner join pk1 on pk1.col1 = fk.col1 or fk.col1 is null inner join pk2 on pk2.col1 = fk.col2 inner join pk3 on pk3.col1 = fk.col3 or fk.col3 is null
+------+------+------+------+
| col1 | col2 | col3 | col4 |
+------+------+------+------+
| null | 1 | 1 | 20 |
| null | 1 | 2 | 50 |
| 1 | 1 | null | 10 |
| 1 | 1 | null | 30 |
| 1 | 1 | null | 40 |
| 1 | 1 | 1 | 70 |
| 1 | 1 | 1 | 100 |
| 2 | 2 | 3 | 80 |
| 2 | 3 | 1 | 60 |
+------+------+------+------+
The above is the reqd output, but the query will be very slow if there are more NULL valued rows in col1 and col3, since I need to also use distinct if I use 'IS NULL' check in JOIN.
Please let me know if there is an aliternative to this query which can return the same result set in an efficient manner.
Most Efficient FIFO Logging.
Jul 14, 2006My buddy has an application that logs entries, and for space reasons needs to only retain a maximum N records in the log table. He wants to delete old log entries as part of the insert procedure. Here is his stab at it:CREATE PROCEDURE spInserttblLog
@Message varchar(1024),
@LogDate datetime,
@ElapsedSeconds float,
@LogLevel varchar(50),
@UserName varchar(100),
@ProcessName varchar(100),
@MachineName varchar(100),
@MaxEntries int=0
AS
declare @ varchar(300)
if @MaxEntries > 0
Begin
set @MaxEntries = @MaxEntries -1
set @SQL='Delete From tblLog Where LogID Not In (Select Top ' + cast(@MaxEntries as varchar) + ' LogID from tblLog order by LogID desc)'
execute (@SQL)
End
insert into tblLog
(Message,
LogDate,
ElapsedSeconds,
LogLevel,
UserName,
ProcessName,
MachineName)
values(@Message,
@LogDate,
@ElapsedSeconds,
@LogLevel,
@UserName,
@ProcessName,
@MachineName)
I think this would be more efficient:--SQL Server
CREATEPROCEDURE spInserttblLog
@Message varchar(1024),
@LogDate datetime,
@ElapsedSeconds float,
@LogLevel varchar(50),
@UserName varchar(100),
@ProcessName varchar(100),
@MachineName varchar(100),
@MaxEntries int=0
AS
delete
fromtblLog
whereLogID < (select max(LogID) from tlbLog) - @MaxEntries - 2
and @MaxEntries > 0
insert into tblLog
(Message,
LogDate,
ElapsedSeconds,
LogLevel,
UserName,
ProcessName,
MachineName)
values(@Message,
@LogDate,
@ElapsedSeconds,
@LogLevel,
@UserName,
@ProcessName,
@MachineName)Comments, or suggestion for an even faster method? This is a relatively high-activity table, so there are a lot of inserts.
Efficient Way Of Writing This Query
Mar 31, 2008I am using a Table Many Times in Left Outer Joins and Inner Joins for various Conditions,
is there anyway of writing a query using minimal Table usage, instead of Recurring all the time.
**********************************
SELECT
blog.blogid,
BM.TITLE,
U.USER_FIRSTNAME+ ' ' + U.USER_LASTNAME AS AUTHORNAME,
Blog_Entries = (cASE WHEN Blog_Entries is NULL or Blog_Entries = ' ' then 0 else Blog_Entries END),
Blog_NewEntries = (cASE WHEN Blog_NewEntries is NULL or Blog_NewEntries = ' ' then 0 else Blog_NewEntries END),
Blog_comments = (cASE WHEN Blog_comments is NULL or Blog_comments = ' ' then 0 else Blog_comments END),
dbo.DateFloor(VCOM.objCreationDate) AS CreationDate,
dbo.DateFloor(BLE.entryDate) AS Date_LastEntry
FROM vportal4VSEARCHCOMM.dbo.blog_metaData BM
INNER JOIN vportal4VSEARCHCOMM.dbo.blog BLOG
ON BM.BLOGID = BLOG.BLOGID
INNER JOIN vportal4VSEARCH.dbo.[USER] U
ON U.USER_ID = BLOG.OWNERID
INNER JOIN vportal4VSEARCHCOMM.dbo.vComm_obj VCOM
ON BLOG.vCommObjID = VCOM.vCommObjId
INNER JOIN vportal4VSEARCHCOMM.dbo.blog_entry BLE
ON BLOG.BLOGID = BLE.BLOGID
LEFT OUTER JOIN
(SELECT BlogID, Blog_Entries = COUNT(*)
FROM vportal4VSEARCHCOMM.dbo.Blog_Entry
GROUP BY BlogID )B on B.BLOGID = BM.BLOGID
LEFT OUTER JOIN
(
SELECT BlogID, Blog_NewEntries = COUNT(*)
FROM vportal4VSEARCHCOMM.dbo.Blog_Entry
WHERE ENTRYDATE > '01/01/2008'
GROUP BY BlogID )C on C.BLOGID = BM.BLOGID
LEFT OUTER JOIN
(
SELECT BEN.BLOGID, Blog_comments = COUNT(*)
FROM vportal4VSEARCHCOMM.dbo.blog_comment BC
INNER JOIN vportal4VSEARCHCOMM.dbo.blog_entry BEN
ON BEN.blog_entryId = BC.blogEntryId
GROUP BY BEN.BLOGID )D on D.BLOGID = BM.BLOGID
WHERE VCOM.objName like '%blog%'
thanks
More Efficient Than LEFT JOIN
Feb 15, 2006I have a table with data that is refreshed regularly but I still need tostore the old data. I have created a seperate table with a foreign keyto the table and the date on which it was replaced. I'm looking for anefficient way to select only the active data.Currently I use:SELECT ...FROM DataTable AS DLEFT OUTER JOIN InactiveTable AS I ON I.Key = D.KeyWHERE D.Key IS NULLHowever I am not convinced that this is the most efficient, or the mostintuitive method of acheiving this.Can anyone suggest a more efficient way of getting this informationplease.Many thanks.*** Sent via Developersdex http://www.developersdex.com ***
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