Do Pre-defined Joins In SQL Server Slown Down Inserts/deletions?
Sep 1, 2005
I wanted to know if SQL Server 2000 does something behind the scenes in a transparent manner whenever records are inserted/deleted from two tables between which a join is defined based on a primary key to foreign key relationship. So I have already defined a parent-child relationship through the 'Database Diagram' between these 2 tables. I know when a table is indexed then SQL Server will perform some actions behind the scenes in a transparent manner.The reason I am asking this question is to know if its bad to define parent-child relatioship between 2 tables that will each contain thousands or millions of records.
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Sep 20, 2011
I have some confusion on crossjoin function within MDx.while I try to crossjoin the different level sets of same Hierarchy. It shows error as
For example.
‘The Customer Geography hierarchy is used more than once in the Crossjoin function.’
select {
{[Customer].[Customer Geography].[Country].&[United States]}*
{[Customer].[Customer Geography].[State-Province].members}}
on 0
FROM [Adventure Works]
WHERE Measures.[Internet Sales Amount]
Cannot we Cross joins across user defined hierarchies ,or they aren't supported .?Coz I really need to implement as above MDx within my real Cube.I try to implement by making as another Hierarchy Member but it doesn’t gives the value result as what we want/need.with
member [Customer].[Country].[United States ]as [Customer].[Customer Geography].[Country].&[United States]
select {
{[Customer].[Country].[United States ]}*
{[Customer].[Customer Geography].[State-Province].members}}
on 0
FROM [Adventure Works]
WHERE Measures.[Internet Sales Amount]
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Jul 23, 2005
I have written a trigger that's supposed to go out and deletecorresponding records from multiple tables once I delete a specificrecord from a table called tblAdmissions.This does not work and I'm not sure why...Here's the code that's supposed to run, let's say, if a user (via a VB6.0 interface) decides to delete a record. If the record in thetblAdmissions table has the primary key (AdmissionID) of "123", thenthe code below is supposed to search other tables that have relatedinformation in them and also have an AdmissionID of "123" and deletethat information as well.Any ideas? Here's the code:CREATE TRIGGER tr_DeleteAdmissionRelatedInfo-- and here is the table nameON tblAdmissions-- the operation type goes hereFOR DELETEAS-- I just need one variable this timeDECLARE @AdmissionID int-- Now I'll make use of the deleted virtual tableSELECT @AdmissionID = (SELECT @AdmissionID FROM Deleted)-- And now I'll use that value to delete the data in-- the tblASIFollowUp TableDELETE FROM tblASIFollowUpWHERE AdmissionID = @AdmissionID-- And now I'll use that value to delete the data in-- the tblProgramDischarge TableDELETE FROM tblProgramDischargeWHERE AdmissionID = @AdmissionID-- And now I'll use that value to delete the data in-- the tblRoomAssignment TableDELETE FROM tblRoomAssignmentWHERE AdmissionID = @AdmissionID-- And now I'll use that value to delete the data in-- the tblTOADS TableDELETE FROM tblTOADSWHERE AdmissionID = @AdmissionID-- And now I'll use that value to delete the data in-- the tblUnitedWaySurvey TableDELETE FROM tblUnitedWaySurveyWHERE AdmissionID = @AdmissionID-- And now I'll use that value to delete the data in-- the tblWFGMSurvey TableDELETE FROM tblWFGMSurveyWHERE AdmissionID = @AdmissionID
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Jul 23, 2005
Quick question about deleting data from SQL Server.We have a table that gets quite a bit of activity with an attribute oftype text (inserts that store new text entries of 50-200k apiece).Older rows aren't needed so we have a process that deletes rows morethan 30 days old (using delete statements).When these rows are deleted, is the memory consumed by theseautomatically recovered? Or is there some process that must beperformed to recover the space? What about the transaction log? Doesthat grow with each deletion? When do transaction logs get reset?Thanks,John
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Jun 25, 2002
Does an Differential Backup contain all the changes since the last full backup, including Inserts, Updates, and Deletions. Our DB has "Truncate on Checkpoint" = True, so Log backups are non-sensical. I want to apply the Differentials to an archive, offline DB.
"one pebble does not fill the void, but it is a start."
"Dedicated to only creating original mistakes."
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Dec 8, 1999
Guys, could anyone tell me if MSSQL Server 7 has 'on delete cascade' option when creating a foreign key constraint or something similar to it. I'd really like MSSQL to remove all dependent records (child records) automatically from one table when I'm deleting a parent record from another record. I know that I can do it via trigger, but the FK constraint should be removed or disabled. I would really appreciate your help. Thank you very much.
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Jul 20, 2005
hello to all,there are two databases named A and B.One database contains employee id as primaryI have another project database which includes that employee id asforeign key. How can I reflect my updations,deletionsthank you in advance,vishnu
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Nov 3, 2000
We 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.
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Aug 11, 2005
SQL 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
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Oct 30, 2007
Hi All,
I'm a relative novice on SQL Server and am a complete beginner at SQL, so am looking for a little help.
I currently use a DTS package to perform inserts / updates to a "production" table.
The DTS package transforms a comma separated file into a "temporary" table that is truncated / cleared before the load starts.
The temporary table has a column denoting Insert or Update. The production table is almost identical, however, doesn't contain the Insert / Update column. The DTS package then, depending upon the Insert / Update flag, either inserts data into the production table or updates data in the production table.
When the DTS package has completed, I'd like to be able to run an SQL Query that validates everything in the "temporary" table is identical to that in the "production" table, which it should be.
I have managed to do some queries to verify that everything has loaded / updated i.e. select primary_key from temporary table where primary_key not in (select * from production table), however, what I haven't been able to do is verify that all the columns on the temporary table match the values in the production table (excluding the Insert / Update flag).
I tried concatenating the columns in each table and comparing the concatenated values, however, this failed due to the different data-types, i.e. decimal, text etc.
Any help will be greatly appreciated.
Many thanks.
Cheers,
David
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Sep 18, 2007
I have a SQL Server 2005 database where covering indexes had to be used to improve performance for the heavy amounts of retrievals; however, the inserts into the tables are now very slow of course. Is there any way to improve the performance of the inserts without taking away the indexes.
Would changing locking or partitioning the index help the inserts?
Other databases use a concept of "freespace" to set up in the beginning - making pre-existing space for inserts - is there anything like this in SQL Server 2005?
Thanks for any help, Mary
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Apr 2, 2008
hai,
how can i identify the function is user defined or the system defined function....................
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Feb 27, 2008
Hi!We have SQL Server 2000 on virtual machine (slowly). We run a pair ofstored procedures from ADO.NET 2.0 (WebService):- first procedure: insert into table A a data row with correlationID- next procedure: search for inserted record in tab A bycorrelationID and insert value into tab B with constraint to tab A.The problem is when we try to do this in short time (few minutes)thousands times (5000/6000 pairs in 5/6 minutes) in 100 parallelthreads:query in second procedure cannot find inserted record in firstprocedure.Everything is dirty read. no transactions.Have you any ideas?edi
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Jul 20, 2005
Hello,Can someone point me to getting the total number of inserts and updates on a tableover a period of time?I just want to measure the insert and update activity on the tables.Thanks.- Vish
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Mar 19, 2008
I'm at loss how I'm supposed to work with typed datasets and Sql Server Compact 3.5, when inserting records and I need to update my datatables with the primary key of newly inserted rows.
I've tried adding a RowUpdated handler to all tableadapters that look like this:
Code Snippet
void Adapter_RowUpdated(object sender, System.Data.SqlServerCe.SqlCeRowUpdatedEventArgs e) {
if(e.Status == UpdateStatus.Continue && e.StatementType == StatementType.Insert) {
if(e.Row.Table.PrimaryKey.Length > 0) {
SqlCeCommand selectIdentityCommand = new SqlCeCommand("SELECT @@IDENTITY",e.Command.Connection);
if(e.Command.Connection.State == ConnectionState.Open) {
e.Row[e.Row.Table.PrimaryKey[0].Ordinal] = (int)selectIdentityCommand.ExecuteScalar();
}
}
}
I've previously used this type of approach when working with an OleDbDatabase, which works just fine. But it doesn't work with Sql Server CE 3.5, and since it doesn't support stored procedures I can't fix it that way either. And it doesn't support commands in a batch (i.e appending the Insert command of the adapter with ";SELECT @@IDENTITY") so that doesn't work either...
So how are we supposed to use Sql Server CE 3.5? It's impossible together with datasets? Or am I missing something obvious?
Any hints would be greatly appreciated! Thanks!
Cheers!
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Apr 2, 2015
I have a production DB that all of a sudden it seems that any and every insert causes massive locks/blocks.
If I kill the offending spid anther spids pops up with the block/lock.!
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Apr 10, 2015
I am trying to create a trigger on a table. Let's call it table ABC. Table looks like this:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ABC](
[id] [uniqueidentifier] NOT NULL,
[Code] ....
When someone updates a row on table ABC, I want to insert the original values along with the current date and time getdate() into table ABCD with the current date and time into the updateDate field as defined below:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ABCD](
[id] [uniqueidentifier] NOT NULL,
[Code] .....
The trigger I've currently written looks like this:
/****** Object: Trigger [dbo].[ABC_trigger] Script Date: 4/10/2015 1:32:33 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[ABC_trigger] ON [dbo].[ABC]
[Code] ...
This trigger works, but it inserts all of the rows every time. My question is how can I get the trigger to just insert the last row updated?
I can't sort by uniqueidentifier in descending as those can be random.
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Apr 26, 2015
We have a database with a table that contains around 180m records. Each day a further 70k are inserted. No records are ever deleted as this table is used for archiving only.Users are required to perform SELECTs on this table constantly but due to the high number of INSERTs the indexes become very fragmented very quickly. My aim is to avoid daily rebuilds of the indexes which is what our software house is telling us we have to do.
This is the DDL for the table:
CREATE TABLE [dbo].[Inventory](
[EAN] [bigint] NOT NULL,
[Day] [smalldatetime] NOT NULL,
[State] [int] NOT NULL,
[Quantity] [int] NULL,
[StockValue] [float] NULL,
CONSTRAINT [PK_Inventory] PRIMARY KEY CLUSTERED
[code]...
There are also three clustered Indexes on this table each referencing a single column. The problem from my side is that I cannot understand why the three columns in a primary key would also be configured as non-clustered indexes.My solution would be one of the following:
1. Accept the tables are going to be fragmented and require a daily rebuild (don't like this one!)
2. Partition the table
3. Remove the non-clustered Indexes and let the clustered index for the primary key do the work.
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Nov 21, 2007
Hi,
I have the following problem: Within a VBScript, I use a component (written in C++ I think with use of ADO) for sending "Insert", "Update" Statements to an SQL Server 2000 for inserting, updating data. If I insert 100 - 120 Records in a Loop, all works fine. If I insert 1000 records, approximately 150 records will be inserted very quick, then the program pause fo approx. 8 - 15 minutes and then it proceed for the next 150 recs, pause for 8 - 15 minutes and so on.
If I use a SQL Server 2005 for the database, all works fine. The same happens with another customer and another program written in Visual Basic 6.0 with ADO. The access to SQL 2000 pause and with SQL 2005 all works fine. It seems to me that this is a problem with some buffers, timeout, or so. Has anyone an idea on what screw I can turn?
Thanks
Hans
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Jan 28, 2015
I have this table
CREATE TABLE [Sales].[Test_inmem]
(
[c1] [int] NOT NULL,
[c2] [nvarchar](20) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[ModifiedDate] [datetime2](7) NOT NULL CONSTRAINT [IMDF_Test_ModifiedDate] DEFAULT (sysdatetime()),
[Code] ....
I have to generate 1000000 random records into it. I tried various ways to insert records, but not being a developer could not do it. I hope to make the C1 as a serial number, C2 can be anything, C3 I want to be the timestamp.
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May 14, 2008
2 examples:
1) Rows ordered using textual id rather than numeric id
Code Snippet
select
cast(v.id as nvarchar(2)) id
from
(
select 1 id
union select 2 id
union select 11 id
) v
order by
v.id
Result set is ordered as: 1, 11, 2
I expect: 1,2,11
if renamed or removed alias for "cast(v.id as nvarchar(2))" expression then all works fine.
2) SQL server reject query below with next message
Server: Msg 169, Level 15, State 3, Line 16
A column has been specified more than once in the order by list. Columns in the order by list must be unique.
Code Snippet
select
cast(v.id as nvarchar(2)) id
from
(
select 1 id
union select 2 id
union select 11 id
) v
cross join (
select 1 id
union select 2 id
union select 11 id
) u
order by
v.id
,u.id
Again, if renamed or removed alias for "cast(v.id as nvarchar(2))" expression then all works fine.
It reproducible on
Microsoft SQL Server 2000 - 8.00.2039 (Intel X86) May 3 2005 23:18:38 Copyright (c) 1988-2003 Microsoft Corporation Developer Edition on Windows NT 5.1 (Build 2600: Service Pack 2)
and
Microsoft SQL Server 2005 - 9.00.3042.00 (Intel X86) Feb 9 2007 22:47:07 Copyright (c) 1988-2005 Microsoft Corporation Developer Edition on Windows NT 5.1 (Build 2600: Service Pack 2)
In both cases database collation is SQL_Latin1_General_CP1251_CS_AS
If I check quieries above on database with SQL_Latin1_General_CP1_CI_AS collation then it works fine again.
Could someone clarify - is it bug or expected behaviour?
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May 27, 2014
I need a script that inserts the data of an excel sheet into a table. If something already exists it should leave it, unless it's edited in the excel sheet and so on and so on. This proces has to go through a stored procedure... ...But how?
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Jun 14, 2005
I have a very silly question.Does anyone know What is result of Inner Join ( left Join, Outer Join)
I tried to search but did not find any results for this.I would really appreciate if someone helps me out.
Thanks,
Siri
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May 20, 2015
I have a pretty simple SSIS package that fast loads a 100 million record table into a SQL Server 2008 table on a daily basis. This normally runs fine and completes in about 1 hour. As this is perhaps one of our largest running SSIS packages, about once every 2-3 weeks this SSIS will fail/drop connection. Once it fails, the large number of records will start rolling back. This rollback process can take 1+ hours so I cannot even restart the failed SSIS package immediately. This is a problem.
I am looking for a solution or option so I do not have to wait on that rollback to restart this particular, long running SSIS package. Is there an option/setting to leave the partial data set committed and not rollback? Then I could just restart the SSIS package immediately or set it the SSIS to auto-restart 1 time on failure. The first step in the SSIS does a truncate of the destination table.
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May 4, 2006
Running SQL Server Personal Ed (Server A) on Tablet PC (publication and distribution setup here) trying to push data to SQL Server 2000 Enterprise Ed. (Server B). When I start sync I get two failures. First is 'remote server not defined as subscription server'. Second, subscription to publication xx not valid (error# -2147201019). The snapshot is succeeding fine. What do I need to setup on Server B? I have the same db on both servers.
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Aug 6, 2002
Hi,
I need to change some SQL statements in Oracle to to SQL Server syntax.
For example, the following is a query in Oracle SQL syntax.
================================================== ===========================
SELECT
COUNT(*)
FROM TABLE1 T1,
TABLE2 T2,
TABLE3 T3,
TABLE4 T4,
TABLE5 T5
WHERE
(
T1.NO(+)=T3.NO
AND T3.NO=T2.NO(+)
AND T4.NO(+)=T3.NO
AND T3.NO=T5.NO(+)
)
AND
(
T1.CODE(+)='VALUE1'
AND T2.CODE(+)='VALUE2'
AND T4.CODE(+)='VALUE3'
AND T5.CODE(+)='VALUE4'
)
================================================== =========================
Can you anyone please tell me the SQL Server equivalent? I am having doubts in the outerjoin part.
Thanks in advance
Regards
R
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Jan 4, 2008
Hi I have a requirement where in i haev to convert the SQL from Oracleto the one which will run on the SQL server.in the Oracle Query i am doing multiple joins, between some 13 tables.and some of these joins are inner joins and some are Left outer joins.table1 inner joined with table 2table2 inner join with table3table2 inner join with table4table2 left join with table5table5 left jin with table6table6 left jin with table7table7 left jin with table8table8 left jin with table9Any idea how to achieve this??Tianaren
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Mar 26, 2007
Hello,
I'm currently trying to rewrite some existing non-ANSI joins and have come across one that I'm not sure how to handle.
Here is a sample of the existing code:
SELECT receipts_payment_method.transaction_number,
receipts_detail.terms_amt,
receipts_detail.allowed_amt,
isNull(receipts_payment_method.check_number,'n/a') check_number,
isNull(receipts_payment_method.credit_card_type,'n/a') credit_card_type,
isNull(paymnt_method.payment_desc,'n/a') payment_desc,
isNull(cc_type.credit_card_desc,'n/a') credit_card_desc
FROM receipts,
receipts_detail,
receipts_payment_method,
paymnt_method,
cc_type
WHERE (receipts_payment_method.payment_id *= paymnt_method.payment_id) and (cc_type.credit_card_id =* receipts_payment_method.credit_card_type) and (receipts_payment_method.transaction_number = receipts.transaction_number);
I'm not sure how to rewrite the two joins since there are 3 tables involved (receipts_payment_method, paymnt_method, and cc_type) along with an "and".
Any help would be appreciated! Thanks in advance!
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Mar 20, 2008
Can anybody answer this question ?
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Nov 4, 2004
hai,
I have 3 fields in my table say (F1, F2, F3). I want to get the max value out of the three fields for each row. I can create a user-defined function which accepts 3 arguments and then return the max value if i am using SQL Server 2000. But now i am using only SQL Server 7.0 (it does not support user-defined functions :confused: )
So any one could kindly let me know how could i do it in SQL Server 7.0
Thnks in advance
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Mar 24, 2004
I'm in the process of writing some utility scripts which will
interface SQL2K to our backup storage system, Tivoli. In our shop we
"fire" the backup process from the Tivoli storage server by invoking a
command script on the client server. The issue I've run into is that
some of our servers were installed with Named Instances, either
instead of or in addition to the default instance.
Rather than hard coding these values in the scripts I'm looking for a
way to determine all the instance names on a server. The scripts
could then be generic without custom tailoring for current and future
servers (and instances).
Anyone have a solution?
Thanks,
Fred Prose - Arizona Supreme Court
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Jul 20, 2005
Hi all!!Does anybody know how I can create a function in SQL 7.0?? I have tocreate functions that return a value that can be used in a selectstatement. I think SQL Server version 7.0 doesn't support CREATEFUNCTION, does it?Ex:Select MyFunction(Parameter)From MyTableThanks a lot,
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Oct 12, 1999
Hi,
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
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