Locks - Isolation Levels
May 22, 2006
Good morning,
I am trying to get my head around locking (row, table) and Isolation Levels. We have written a large .NET/SQL application and one day last week we had about two dozen people in our company do some semi "stress/load" testing of the app.
On quite a few occassions, a few of the users would receive the following error:
"Transaction (Process ID xx) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction."
We are handling this on two fronts, the app and the database. The error handling in the app is being modified to capture this specific error and to retry the transaction.
However, from the database side, I am trying to find the most affective and efficient change to make regarding locking. I have been doing a lot of reading online and in BOL to get a better grasp of locking, but what I would really like is feedback from the community (forum) and get your thoughts on what changes I should make, if any, on the db side.
Thanks...
Scott
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Oct 27, 2005
Have the need for going to a table to get an identity value. This is for updating an existing database, blah blah blah. Here is the schema of the table we are using:CREATE TABLE [TableIdentityValue] ( [TableName] [varchar] (50) , [NextNegativeIdentity] [int] NOT NULL , [NextPositiveIdentity] [int] NOT NULL , CONSTRAINT [PK_TableIdentityValue] PRIMARY KEY CLUSTERED ( [TableName] ) ON [PRIMARY] ) ON [PRIMARY]GO
Now, depending on the type of data we are inserting into a table, we need to get either a negative or positive number for the PK. There are two sprocs that control the obtaining of those values:CREATE PROCEDURE GetNegativeIdentity @tableName varchar(50)AS DECLARE @nextNegativeIdentityValue int
BEGIN TRANSACTION SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
SET @nextNegativeIdentityValue = ( SELECT NextNegativeIdentity FROM TableIdentityValue WITH (ROWLOCK) WHERE TableName = @tableName )
UPDATE TableIdentityValue SET NextNegativeIdentity = @nextNegativeIdentityValue - 1 WHERE TableName = @tableName
COMMIT TRANSACTION RETURN @nextNegativeIdentityValueGOCREATE PROCEDURE GetPositiveIdentity @tableName varchar(50)AS DECLARE @nextPositiveIdentityValue int
BEGIN TRANSACTION SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
SET @nextPositiveIdentityValue = ( SELECT NextPositiveIdentity FROM TableIdentityValue WHERE TableName = @tableName )
UPDATE TableIdentityValue SET NextPositiveIdentity = @nextPositiveIdentityValue + 1 WHERE TableName = @tableName
COMMIT TRANSACTION RETURN @nextPositiveIdentityValueGOSo, the thing is, we need the read and update of the value from the specific TableIdentityValue row to be atomic - we don't want anyone else reading or modifying that data. The problem is knowing which level of isolation to use and/or locking, and how to implement that. I have tried a few different things that seemed to make sense, like placing a ROWLOCK on the SELECT statement, but is that lock going to hold for the entire length of the transaction? Also, I read that using some of the lock hints can be accomplished in the sense that some isolation levels are the same as some lock hints (e.g. setting isolation level to SERIALIZABLE "has the same effect as setting HOLDLOCK on all tables in all SELECT statements in a transaction" according to SQL Books Online.Any help is appreciated!
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Feb 15, 2006
I am redesigning an application that distributes heldesk tickets to our50 engineers automatically. When the engineer logs into their window astored procedure executes that searches through all open tickets andassigns a predetermined amount of the open tickets to that engineer.Theproblem I am running into is that if 2 or more engineers log in at thesame time the stored procedure will distribute the same set of ticketsmultiple times.Originally this was fixed by "reworking" the way SQL Server handlestransactions. The original developer wrote his code like this:-----DECLARE @RET_STAT INTSELECT 'X' INTO #TEMPBEGIN TRANUPDATE #TEMP SET 'X' = 'Y'SELECT TOP 1 @TICKET_# =TICKET_NUMBER FROM TICKETS WHERE STATUS = 'O'EXEC @RET_STAT = USP_MOVE2QUEUE @TICKET_#, @USERIDIF @RET_STAT <> 0ROLLBACK TRANRETURN @RET_STATENDCOMMIT TRAN-----The UPDATE of the #TEMP table forces the transaction to kick off andlocks the row in table TICKETS until the entire transaction hascompleted.I would like to get rid of the #TEMP table and start using isolationlevels, but I am unsure which isolation level would continue to lockthe selected data and not allow anyone else access. Do I need acombination of isolation level and "WITH (ROWLOCK)"?Additionally, the TICKETS table is used throughout the application andI cannot exclusively lock the entire table just for the distributionprocess. It is VERY high I/O!Thanks for the help.
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Oct 12, 2015
We are getting frequently blocking in Report server database.
Is it ok to change isolation level to RCSI for report server database?
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Mar 12, 2008
Hello,
I have some locks issues on production database (win 2k3 SP1, sql server 2k5).
In fact, I have an asynchronous process that makes SELECT TOP 1 in a table and UPDATE the selected row. The transaction isolation level for doing this action is READUNCOMMITTED.
The isolation level readuncommitted is ignored for the update if I'm not wrong.
On the other hand, I have some transactional activities with the isolation level read uncommitted too.
But when I control the database activity, I find very often locks between the asynchronous part and the transactional part. This is the transactional activity that is locking the asynchronous activity.
The transactional activity is a simple SELECT and this type of query, in spite of the isolation level readuncommitted, makes exclusives locks when the asynchronous makes LCK_M_U.
I tried to modify the strored procedure for the SELECT/UPDATE of the asynchronous process with a "UPDATE my_table ... FROM my_table" query in order to reduce the transaction time. But the problem is always present.
Can someone help me to understand how a select query with the isolation level readuncommtted can make exclusives locks ?
Thanks in advance.
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Jul 16, 2015
I've got an INSERT that's selecting data from a linked server and attempting to push 10 million rows into the blank table. More or less, it looks like this:
insert into ReceivingTable (
Field1, Field2, Field3, Field4
, Field5, Field6, Field7, Field8
, Field9, Field10, Field11, Field12
, Field13, Field14, Field15
[code]...
The instance of the SQL Server Database Engine cannot obtain a LOCK resource at this time. Rerun your statement when there are fewer active users. Ask the database administrator to check the lock and memory configuration for this instance, or to check for long-running transactions. There are no other active users. I ran it again and monitored the following DMO to watch the growth of locks for that spid:
SELECT request_session_id, COUNT (*) num_locks
-- select *
FROM sys.dm_tran_locks
--where request_session_id = 77
GROUP BY request_session_id
ORDER BY count (*) DESC
The number of locks started small and held for a while around 4-7 locks, but at about 5 minutes in the number of locks held by that spid grew dramatically to more than 8 million before finally erroring again with the same message. Researching, I can't figure out why it's not escalating from row locks to table locks at the appropriate threshold. The threshold in was set to 0 at first (Server Properties > Advanced > Parallelism > Locks). I set it to 5000, and it still didn't seem to work. Rewriting the INSERT to include a WITH (TABLOCK) allows it to finish successfully in testing. My problem is that it's coming out of an ETL with source code that I can't edit. I need to figure out how to force it to escalate to locking the entire table via table or server level settings.
A colleague suggested that installing service packs may take care of it (the client is running SQL Server 2008 R2 (RTM)), but I haven't found anything online to support that theory.
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Aug 5, 2015
We are migrating our database(s) from ORACLE to SQL. In Oracle we were able to issue a SELECT statement and see all of the locks (Blocking and Non-Blocking) currently in the system. The query also included the Process ID of the process we needed to kill in order to get rid of the lock.
We now need to create the same type of query for Microsoft SQL Server 2012. I have seen postings on different sites saying that this info can be obtained using SP_WHO2 or using the SQL Server Management Studio Activity Monitor's PROCESSES tab, but we are looking for a SELECT statement that will give us similar information.
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Feb 24, 2004
I have just started working the 2047 OLAP and came arcross the Analysis Service Limits. It states that the levels in a cube has a limit of 256 and the leves per dimension is 64. I am confused.
What is the definition of (levels in a cube)! and how are the levels in a cube different from (levels per dimension)
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Mar 30, 2006
I'm having trouble getting a FOR XML query to get the relationships correct when there are 3 levels of data.
In this example, I have 3 tables, GG_Grandpas, DD_Dads, KK_Kids. As you would expect, the Dads table is a child of the Grandpas table, and the Kids table is a child of the Dads table.
I'm using the Bush family in this example, these are the relationships:
- George SR
--- George JR
------ Jenna
------ Barbara
--- Jeb
------ Jeb JR
------ Noelle
These statements will create and populate the tables for the example with the above relationships:
SET NOCOUNT ON
DROP TABLE KK_Kids, DD_Dads, GG_Grandpas
CREATE TABLE GG_Grandpas ( GG_Grandpa_Key varchar(20) NOT NULL, GG_GrandpaName varchar(20))
CREATE TABLE DD_Dads ( DD_Dad_Key varchar(20) NOT NULL, DD_Grandpa_Key varchar(20) NOT NULL, DD_DadName varchar(20))
CREATE TABLE KK_Kids ( KK_Kid_Key varchar(20) NOT NULL, KK_Dad_Key varchar(20) NOT NULL, KK_KidName varchar(20))
ALTER TABLE GG_Grandpas ADD CONSTRAINT PK_GG PRIMARY KEY (GG_Grandpa_Key)
ALTER TABLE DD_Dads ADD CONSTRAINT PK_DD PRIMARY KEY (DD_Dad_Key)
ALTER TABLE KK_Kids ADD CONSTRAINT PK_KK PRIMARY KEY (KK_Kid_Key)
ALTER TABLE DD_Dads ADD CONSTRAINT FK_DD FOREIGN KEY (DD_Grandpa_Key) REFERENCES GG_Grandpas (GG_Grandpa_Key)
ALTER TABLE KK_Kids ADD CONSTRAINT FK_KK FOREIGN KEY (KK_Dad_Key) REFERENCES DD_Dads (DD_Dad_Key)
INSERT INTO GG_Grandpas VALUES ('GG_GEORGESR_KEY', 'GEORGE SR')
INSERT INTO DD_Dads VALUES ('DD_GEORGEJR_KEY', 'GG_GEORGESR_KEY', 'GEORGE JR')
INSERT INTO DD_Dads VALUES ('DD_JEB_KEY', 'GG_GEORGESR_KEY', 'JEB')
INSERT INTO KK_Kids VALUES ( 'KK_Jenna_Key', 'DD_GEORGEJR_KEY', 'Jenna' )
INSERT INTO KK_Kids VALUES ( 'KK_Barbara_Key', 'DD_GEORGEJR_KEY', 'Barbara' )
INSERT INTO KK_Kids VALUES ( 'KK_Noelle_Key', 'DD_JEB_KEY', 'Noelle' )
INSERT INTO KK_Kids VALUES ( 'KK_JebJR_Key', 'DD_JEB_KEY', 'Jeb Junior' )
So the question is, how do I get it to maintain the proper relationships between the records when I do an FOR XML query? Here is the query I am trying to get to work. Right now it puts all the Kids under a single Dad, rather than having them under their correct dads.
I am getting this, which is not what I want:
- George SR
--- George JR
--- Jeb
------ Jenna
------ Barbara
------ Jeb JR
------ Noelle
SELECT 1 as Tag,
NULL as Parent,
GG_GrandpaName as [GG_Grandpas!1!GG_GrandpaName],
GG_Grandpa_Key as [GG_Grandpas!1!GG_Grandpa_Key!id],
NULL as [DD_Dads!2!DD_DadName],
NULL as [DD_Dads!2!DD_Dad_Key!id],
NULL as [DD_Dads!2!DD_Grandpa_Key!idref],
NULL as [KK_Kids!3!KK_KidName],
NULL as [KK_Kids!3!KK_Dad_Key!idref]
FROM GG_Grandpas
UNION ALL
SELECT 2 ,
1 ,
NULL ,
GG_Grandpa_Key ,
DD_DadName ,
DD_Dad_Key ,
DD_Grandpa_Key ,
NULL ,
NULL
FROM GG_Grandpas, DD_Dads
WHERE GG_Grandpa_Key = DD_Grandpa_Key
UNION ALL
SELECT 3 ,
2 ,
NULL ,
GG_Grandpa_Key ,
NULL ,
DD_Dad_Key ,
NULL ,
KK_KidName ,
KK_Dad_Key
FROM GG_Grandpas, DD_Dads , KK_Kids
WHERE GG_Grandpa_Key = DD_Grandpa_Key
AND DD_Dad_Key = KK_Dad_Key
FOR XML EXPLICIT
I've tried it all different ways, but no luck so far.
Any ideas?
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Feb 26, 2014
How do I get my data to show starting at the first row instead of skipping down?
Refer to the attachment.
Code:
CREATE PROCEDURE [dbo].[uspReportData]
-- Add the parameters for the stored procedure here
@Metric1 as varchar(50) = NULL, @Metric2 as varchar(50) = NULL, @Metric3 as varchar(50) = NULL, @Metric4 as varchar(50) = NULL,
@Metric5 as varchar(50) = NULL, @Metric6 as varchar(50) = NULL, @Metric7 as varchar(50) = NULL, @Metric8 as varchar(50) = NULL,
[code].....
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Aug 20, 2007
hi
I've a table with coln names
ID
Name
ParentID
Level
I've list with different levels
say
ex.
the Data is:-
ID Name ParentID Level
1 Root null 1
2 Trunk 1 2
3 Branch 2 3
4 Leaf 3 4
5 Stem 3 4
How to write the query for getting the Names for different levels for corresponding ParentID....
Output should be like:-
Leaf Branch Trunk Root
Stem Branch Trunk Root
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Jun 4, 2007
Hi All,
we are building a DW for a company that operates in 10 countries with the home country being the major portion of the data......
Previous efforts have always had the data separated by schemas and so to ask a question about a specific country required the schema number to be provided.
I am proposing that the 10 schemas, and therefore 10x the number of tables, indexes etc, be removed in favour of using partitioning.
However, we want to partition by country and by periods...that is we would like to create monthly partitions as normal.
No matter how I read the documentation and test this out, it seems to me that this multiple levels of partitioning can only be achieved if I create a field on the table that is some manipultion of the key for the company reporting structure and the period. I think I can take the first, add 10M and then add the period key.
But I am unsure if the optimiser is going to do it's partition elimination properly on such a calculated field.
Has anyone attempted such a multi-level partitioning scheme in SQL Server? I am thinking people must have as one level of partitioning was seen to be too restrictive many years ago.....
Thanks in Advance for your comments.
Best Regards
Peter Nolan
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Sep 19, 2007
Hello All,
I suspect I know the answer but I'll ask away. We currently have our SSIS packages set up to log to SQL Server. Currently they log OnError, OnInformation and OnTaskFailed. If I'd like to have it log OnPipeLineRowsSent, is there anyway I can get that done without opening up the package and editing it? I know the change is trivial from the IDE but the deployment process at my current engagement is quite lengthy. If something breaks in production, I'd like to know if it'll be possible to turn up the chattiness of logging without going through a full deploy scenario.
I was looking at the parameters for dtexec/dtexecui and I see that you can configure where something logs but nothing about the verbosity of the logs generated. Is it something I'm missing with that or is that all you can set there?
The only other option that jumps out at me is to develop a custom script or component that sets the logging level based on a parameter. Anyone have a thought as to how much effort that would be---something easily tackled or probably more trouble that it's worth?
Thanks for the help
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Nov 30, 2007
All,
Is anyone aware if the database engine build levels will affect the mirroring process. we're in the process of upgrading a PROD environment to a new build however like to delay onto the disaster recovery (DR) server in case of issues. The DR is the mirror in the setup and so would have a differnet build level.
Is this likely to affect anything? All info seems to point to only versions differences causing a problem but not the build.
Is someone able to confirm this.
Thanks......
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Jan 18, 2001
Hi fellas,
I have to spec out a new server, and I have the option of using RAID-5 or RAID-1 drive sets. I am limited to 24 drives in groups of 6,
and I have to have one hotspare per group, so up to 5 usable drives per channel.
I need 80-100GB of space total.
Okay, you're waiting for the question....I have heard many differing opinions on which is better, RAID 1 or RAID 5. If I have 2 Large disks (say 36GB)
on a Raid-1, I assume having 4 smaller 9GB drives on a RAID-5 will be faster, but I am not sure due to overhead and the like.
Does anyone know where I can get more information on RAID performance and how it is going to affect me? The database is going to be Read-Write, with
a ton of small transactions, and the occasional (usually on a weekend) aggregation.
Any help would be much appreciated,
Joe
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Apr 15, 2003
I have captured some trace output for performance evaluation for an application which has just been upgraded. Originally, this application can only run with database compatible 70.
So, after we have switched this level from 70 to 80, I noticed that all T-SQL statements which executed thru the use of "sp_executesql" have much higher IO usuage. The usage increased from approximately 50 I/O to approximately 12000 I/O. When I reviewed the profiler output, I noticed that all select statements which executed thru this "sp_executesql" statements performed "index scan".
When I switch back to run with database compatibility level 70, my profiler output shows that all these "sp_executesql" statements performed "index seek".
All these statements use the same unique non-clustered index.
Is it a SQL Server bug? Does anyone know which service pack or hot fix address this problem?
Thanks...byyu :)
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Apr 22, 2004
Hi,
I have a Star schema based dimension called Customer which has these levels:
ALL Customers
Level1: Customer Type
Level2: Customer Sub Type
Level3: Customer Name
When a user is browsing the cube, is it possible to hide the the 1st level (and all it's sub-levels)? For example, If the Customer Type = "Low Ranked" then I do not want it to be
displayed to the user while (s)he is selecting from the dimension. HOWEVER I only want it to be hidden from being displayed but it's effect should always reflect e.g. Suppose:
[list=1]
Sales (measure count) for Customers with Type "High Ranked" = 100
Sales (measure count) for Customers with Type "Medium Ranked" = 50
Sales (measure count) for Customers with Type "Low Ranked" = 10
[/list=1]
Now if the user selects 'ALL Customer Type' in the dimension he/she should get a total Sale (measure count) of 160 (i.e. 100+50+10).
However when the user expands the Customers Dimension (i.e. ALL Customers), the resulting child nodes should only list 2 nodes i.e. High Ranked and Medium Ranked.
I went to the cube editor --> Advanced Properties and looked at the 'Hide Member If' property but amongst the 5 options there is none which allows me to specify the criteria.
Maybe the solution already is in one of those 5 options and thus please help me.
Many thanks in advance.
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Dec 17, 2004
We seem to have a problem with permission levels and connecting to an MSDE (MSSQL) server. If the user is under the Domain Admins group, the the access projet (front end) will open correctly and connect to the data server. If they are not part of that group then the front end can ever establish a file to the database server. We do not want to make all the users Domain Admins, so is there a way to make MSDE let them trough even though they are on a lower level.
I've done many tests, and also tried many things. I've even went to the extent to give Full Control to the whole MSSQL folder in program files for Everyone. I have made sure that the database file itself inherieted it's parents security settings, which were what I had just described.
Any ideas how how to make MSDE let anyone connect? Thanks in advance!
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Dec 21, 2007
I Have a table of Data (WikiData)
WikiIDint
ParentIDint
sTitlevarchar(50)
sDescriptionvarchar(MAX)
There will be three levels of data imposed at the Application Layer
Level 1: ParentID = 0
An Item Like Geography
Level 2: ParentID = a Level 1 WikiID
A sub Topic like Volcanoes
Level 3: ParentID = Level 2 WikiID
A bottom Topic like Pyroclastic Flows
I Need a SQL statement that Will Produce the Output where The output will be produced like this:
Level 1
Level 2
Level 2
Level 2
Level 1
Level 2
Level 2
I Built this but its wrong and has no order by Group by Statements
Select * from WikiData where ParentID = 0 or ParentID IN (Select * from WikiData where ParentID = 0)
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Oct 3, 2006
The script below can be used to determine the reference levels of all tables in a database in order to be able to create a script to load tables in the correct order to prevent Foreign Key violations.
This script returns 3 result sets. The first shows the tables in order by level and table name. The second shows tables and tables that reference it in order by table and referencing table. The third shows tables and tables it references in order by table and referenced table.
Tables at level 0 have no related tables, except self-references. Tables at level 1 reference no other table, but are referenced by other tables. Tables at levels 2 and above are tables which reference lower level tables and may be referenced by higher levels. Tables with a level of NULL may indicate a circular reference (example: TableA references TableB and TableB references TableA).
Tables at levels 0 and 1 can be loaded first without FK violations, and then the tables at higher levels can be loaded in order by level from lower to higher to prevent FK violations. All tables at the same level can be loaded at the same time without FK violations.
Tested on SQL 2000 only. Please post any errors found.
Edit 2006/10/10:
Fixed bug with tables that have multiple references, and moved tables that have only self-references to level 1 from level 0.
-- Start of Script - Find_Table_Reference_Levels.sql
/*
Find Table Reference Levels
This script finds table references and ranks them by level in order
to be able to load tables with FK references in the correct order.
Tables can then be loaded one level at a time from lower to higher.
This script also shows all the relationships for each table
by tables it references and by tables that reference it.
Level 0 is tables which have no FK relationships.
Level 1 is tables which reference no other tables, except
themselves, and are only referenced by higher level tables
or themselves.
Levels 2 and above are tables which reference lower levels
and may be referenced by higher levels or themselves.
*/
declare @r table (
PK_TABLE nvarchar(200),
FK_TABLE nvarchar(200),
primary key clustered (PK_TABLE,FK_TABLE))
declare @rs table (
PK_TABLE nvarchar(200),
FK_TABLE nvarchar(200),
primary key clustered (PK_TABLE,FK_TABLE))
declare @t table (
REF_LEVEL int,
TABLE_NAME nvarchar(200) not null primary key clustered )
declare @table table (
TABLE_NAME nvarchar(200) not null primary key clustered )
set nocount off
print 'Load tables for database '+db_name()
insert into @table
select
TABLE_NAME = a.TABLE_SCHEMA+'.'+a.TABLE_NAME
from
INFORMATION_SCHEMA.TABLES a
where
a.TABLE_TYPE = 'BASE TABLE'and
a.TABLE_SCHEMA+'.'+a.TABLE_NAME <> 'dbo.dtproperties'
order by
1
print 'Load PK/FK references'
insert into @r
selectdistinct
PK_TABLE =
b.TABLE_SCHEMA+'.'+b.TABLE_NAME,
FK_TABLE =
c.TABLE_SCHEMA+'.'+c.TABLE_NAME
from
INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS a
join
INFORMATION_SCHEMA.TABLE_CONSTRAINTS b
on
a.CONSTRAINT_SCHEMA = b.CONSTRAINT_SCHEMA and
a.UNIQUE_CONSTRAINT_NAME = b.CONSTRAINT_NAME
join
INFORMATION_SCHEMA.TABLE_CONSTRAINTS c
on
a.CONSTRAINT_SCHEMA = c.CONSTRAINT_SCHEMA and
a.CONSTRAINT_NAME = c.CONSTRAINT_NAME
order by
1,2
print 'Make copy of PK/FK references'
insert into @rs
select
*
from
@r
order by
1,2
print 'Load un-referenced tables as level 0'
insert into @t
select
REF_LEVEL = 0,
a.TABLE_NAME
from
@table a
where
a.TABLE_NAME not in
(
select PK_TABLE from @r union all
select FK_TABLE from @r
)
order by
1
-- select * from @r
print 'Remove self references'
delete from @r
where
PK_TABLE = FK_TABLE
declare @level int
set @level = 0
while @level < 100
begin
set @level = @level + 1
print 'Delete lower level references'
delete from @r
where
PK_TABLE in
( select TABLE_NAME from @t )
or
FK_TABLE in
( select TABLE_NAME from @t )
print 'Load level '+convert(varchar(20),@level)+' tables'
insert into @t
select
REF_LEVEL =@level,
a.TABLE_NAME
from
@table a
where
a.TABLE_NAME not in
( select FK_TABLE from @r )
and
a.TABLE_NAME not in
( select TABLE_NAME from @t )
order by
1
if not exists (select * from @r )
begin
print 'Done loading table levels'
print ''
break
end
end
print 'Count of Tables by level'
print ''
select
REF_LEVEL,
TABLE_COUNT = count(*)
from
@t
group by
REF_LEVEL
order by
REF_LEVEL
print 'Tables in order by level and table name'
print 'Note: Null REF_LEVEL nay indicate possible circular reference'
print ''
select
b.REF_LEVEL,
TABLE_NAME = convert(varchar(40),a.TABLE_NAME)
from
@table a
left join
@t b
on a.TABLE_NAME = b.TABLE_NAME
order by
b.REF_LEVEL,
a.TABLE_NAME
print 'Tables and Referencing Tables'
print ''
select
b.REF_LEVEL,
TABLE_NAME = convert(varchar(40),a.TABLE_NAME),
REFERENCING_TABLE =convert(varchar(40),c.FK_TABLE)
from
@table a
left join
@t b
on a.TABLE_NAME = b.TABLE_NAME
left join
@rs c
on a.TABLE_NAME = c.PK_TABLE
order by
a.TABLE_NAME,
c.FK_TABLE
print 'Tables and Tables Referenced'
print ''
select
b.REF_LEVEL,
TABLE_NAME = convert(varchar(40),a.TABLE_NAME),
TABLE_REFERENCED =convert(varchar(40),c.PK_TABLE)
from
@table a
left join
@t b
on a.TABLE_NAME = b.TABLE_NAME
left join
@rs c
on a.TABLE_NAME = c.FK_TABLE
order by
a.TABLE_NAME,
c.PK_TABLE
-- End of Script
Results from Northwind database:
Load tables for database Northwind
(13 row(s) affected)
Load PK/FK references
(13 row(s) affected)
Make copy of PK/FK references
(13 row(s) affected)
Load un-referenced tables as level 0
(0 row(s) affected)
Remove self references
(1 row(s) affected)
Delete lower level references
(0 row(s) affected)
Load level 1 tables
(7 row(s) affected)
Delete lower level references
(9 row(s) affected)
Load level 2 tables
(4 row(s) affected)
Delete lower level references
(3 row(s) affected)
Load level 3 tables
(2 row(s) affected)
Done loading table levels
Count of Tables by level
REF_LEVEL TABLE_COUNT
----------- -----------
1 7
2 4
3 2
(3 row(s) affected)
Tables in order by level and table name
Note: Null REF_LEVEL nay indicate possible circular reference
REF_LEVEL TABLE_NAME
----------- ----------------------------------------
1 dbo.Categories
1 dbo.CustomerDemographics
1 dbo.Customers
1 dbo.Employees
1 dbo.Region
1 dbo.Shippers
1 dbo.Suppliers
2 dbo.CustomerCustomerDemo
2 dbo.Orders
2 dbo.Products
2 dbo.Territories
3 dbo.EmployeeTerritories
3 dbo.Order Details
(13 row(s) affected)
Tables and Referencing Tables
REF_LEVEL TABLE_NAME REFERENCING_TABLE
----------- ---------------------------------------- ----------------------------------------
1 dbo.Categories dbo.Products
2 dbo.CustomerCustomerDemo NULL
1 dbo.CustomerDemographics dbo.CustomerCustomerDemo
1 dbo.Customers dbo.CustomerCustomerDemo
1 dbo.Customers dbo.Orders
1 dbo.Employees dbo.Employees
1 dbo.Employees dbo.EmployeeTerritories
1 dbo.Employees dbo.Orders
3 dbo.EmployeeTerritories NULL
3 dbo.Order Details NULL
2 dbo.Orders dbo.Order Details
2 dbo.Products dbo.Order Details
1 dbo.Region dbo.Territories
1 dbo.Shippers dbo.Orders
1 dbo.Suppliers dbo.Products
2 dbo.Territories dbo.EmployeeTerritories
(16 row(s) affected)
Tables and Tables Referenced
REF_LEVEL TABLE_NAME TABLE_REFERENCED
----------- ---------------------------------------- ----------------------------------------
1 dbo.Categories NULL
2 dbo.CustomerCustomerDemo dbo.CustomerDemographics
2 dbo.CustomerCustomerDemo dbo.Customers
1 dbo.CustomerDemographics NULL
1 dbo.Customers NULL
1 dbo.Employees dbo.Employees
3 dbo.EmployeeTerritories dbo.Employees
3 dbo.EmployeeTerritories dbo.Territories
3 dbo.Order Details dbo.Orders
3 dbo.Order Details dbo.Products
2 dbo.Orders dbo.Customers
2 dbo.Orders dbo.Employees
2 dbo.Orders dbo.Shippers
2 dbo.Products dbo.Categories
2 dbo.Products dbo.Suppliers
1 dbo.Region NULL
1 dbo.Shippers NULL
1 dbo.Suppliers NULL
2 dbo.Territories dbo.Region
(19 row(s) affected)
CODO ERGO SUM
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Dec 31, 2007
In a new environment where we have 2005 servers and loads of databases that are running in compatibility mode with 2000 (80)
Are there any queries we can run on that can tell me what compatibility level each db is?
Looked on the web for ages apart from here but only info for changing the compatibility level - sp_dbcmptlevel – but queies only seem to be for changing it not and not reporting on it.
But I obviously do not want to do that for a production environment.
I want to do a mini report as to what db’s are still (I think all) 2000 mode and then suggest upgrades – I can go into the properties of each one but I know there must be an easier way – finding a load of admin queries that require cross apply and for that I need 2005 (90) compatibility….or is that only for the master db?
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Feb 20, 2008
All:
I am aware that I am raising an issue/question that has quite a number of ancestors in this forum. In reviewing some of the threads I still believe my situation has a bit of a twist; but that could just be me.
The process I used until a change I made recently worked just fine. A handful of my packages connect to our ERP system that only supports an ODBC connection. I set the Protection Level to the default, and then deploy the packages to the server. I use an agent to run the jobs that include these packages as steps. I have hardcoded the userID and password in the SQL jobs and so they have run fine.
In an effort to reduce maintenance on the packages I decided to run the packages from the File System instead of deploying them to the server. Now, the packages are not running as I have not changes the Protection Level yet. I did test running one of the packages using a Proxy I have created but that does not work either.
Based upon what I have read it appears that the first thing I need to do is change the Protection Level to DoNotSaveSensitive. How do I then pass the ID and password to the agent?
a. Create a confirguation file?
b. Create a package template?
c. Both of the above
To reiterate I do not wish to deploy the packages to the server; I prefer to run the packages from the File System. Further, I just have one box on which everything happens; there are no migration issues across servers.
Some insights from this group will be greatly appreciated.
Thank you!
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Jun 11, 2006
Hi There,
We have been using SQL 2005 in our dev enviroment for a few weeks, and I have just completed migrating our production server to a 64bit instance of SQL 2005 standard.
I have 3 publications, 1 snapshot, and 2 transactional. All go to SQL 2000 databases.
Our dev enviroment is in compatibility level 90, and our application is working fine. My concern is, will changing the production compatibility level from 80 to 90 affect / break replication to SQL 2000 Servers?
Thank you.
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Mar 14, 2005
Is there any tool that documents all the users and their privilage levels in a given database??
I looked at SQL Scribe tool but it doesn't care about documenting users at all!
We need this for documenting hundreds of databases for SOX purpose.
Thanks,
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May 6, 2015
I am trying to fill my table in different levels (hierarchy). The different levels are not properly processed. All layers now have the same value. It is intended that the layers are beaten flat. This implies multiple joins in order to be able to get the different levels.
'Ledgertableinterval' could be used to determine the hierarchy, but I did not come all the way out ...
So my suggestion is to fill with 1 character level 1, level 2 with 2 character and so on. If a level is not available anymore than filling up with higher level. For this you can use the replace function.
The DIM that I use;
USE [NJ]
GO
/****** Object: Table [DIM].[FA] Script Date: 05/06/2015 09:57:24 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [DIM].[FA](
[Code] .....
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Jul 20, 2005
Hi,I need to move a database from an instance running SQL Server 2000 SP3to another running SQL Server 2000 SP2. Can I just use backup/restoreor detach/reattach and let SQL server take care of any downgrading (ifany).Many thanksGiovanni
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Nov 19, 2007
Hi there
We have a web application (database) that uses one field called Application and another called TicketType.
When a user fills out a ticket they can choose up to 3 levels of this field.
Eg Application, Application2, Application3
Eg TicketType, TicketType2, TicketType3
The extra two levels not being compulsory.
I am using sql server 2005 // Reporting Services
My query is as below:
SELECT Ticket.TicketNumber, Ticket.CreatedDate, Application_2.ApplicationName AS Application, Application_1.ApplicationName AS [App 2],
Application.ApplicationName AS [App 3], TicketType_2.TicketTypeName AS Tickettype, TicketType_1.TicketTypeName AS [Type 2],
TicketType.TicketTypeName AS [Type 3], Ticket.Description, Company.CompanyName
FROM Ticket INNER JOIN
TicketType AS TicketType ON Ticket.TicketTypeID = TicketType.TicketTypeID LEFT OUTER JOIN
TicketType AS TicketType_1 ON TicketType.ParentTicketTypeID = TicketType_1.TicketTypeID LEFT OUTER JOIN
TicketType AS TicketType_2 ON TicketType_1.ParentTicketTypeID = TicketType_2.TicketTypeID INNER JOIN
Application AS Application ON Ticket.ApplicationID = Application.ApplicationID INNER JOIN
Company ON Application.CompanyID = Company.CompanyID FULL OUTER JOIN
Application AS Application_1 ON Application.ParentApplicationID = Application_1.ApplicationID FULL OUTER JOIN
Application AS Application_2 ON Application_1.ParentApplicationID = Application_2.ApplicationID
WHERE (Ticket.CreatedDate >= @StartDate)
ORDER BY Ticket.TicketNumber
End result looks like this:
Application
App 2
App 3
TicketType
Type 2
Type 3
Software
Internal Apps
proACT
SW Other
Office Issues
General
Application
Click Track server
Alert (App)
Service
Network
Other
Network Fault
Software
Internal Apps
Other
User Account
New
Hardware
Network
HW Fault
Application
Click Track server
Alert (App)
Disk space
Office Issues
General
proACT
Configuration
Deployment
Software
Server Software
SharePoint
SW Fault
App Failure (Function)
Software
Server Software
SharePoint
SW Fault
App Failure (Function)
Ultimately I would like the Application (TicketType) fields to have the Master Information in it and the other two fields populated in order as well.
Can someone help please.
Please ask if I haven't explained myself.
thanks
Dianne
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Oct 7, 2015
I want to display Month and year from same time hierarchy in two separate columns.My hierarchy is as below:
Ship Date > Ship Date Hierarchy
Ship Date year
Ship Date Quarter
Ship Date month
The display I am looking for is as below
Ship Date year Ship Date Month
measures
2015 Jan
200
2015 Feb
300
I am using Tail function as I need only the last 13 months, below is my query:
with set [Month] as
{
tail([SHIP DATE].[Ship Date Hierarchy].[SHIP CAL MTH].members, 13)
}
select
{[Measures].[TAG BUID Distinct Count]} on 0,
{[Month]* [SHIP DATE].[Ship Date Hierarchy].[SHIP CAL YEAR]} on 1
from
[GSDR_P4]
This gives me error that The Ship Date Hierarchy hierarchy is used more than once in the Crossjoin function.
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Sep 24, 2015
I am having a requirement as below. I am having a Emp_Dim dimension table which is having a Manager_Key which is dependent on again on the Emp_Key. Based on the designation I have to create a Hierarchy. I have to create a Hierarchy with 10 levels according to the Designation.
While extracting data I am giving a particular Area manager id in Emp_Key I should get the accumulated data (His and the employees working under him as well). So it's like my MDX query should be like this if I am giving any emp_key then I need all the business done by under him.
My doubt is how I can establish the relations between the different levels in my Hierarchy. I am pretty new to SSAS.
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Mar 29, 2006
Hi,
My question kind of covers a couple of areas.
I have written some SQL 05 CLR code that produces a single DLL file. I have specified that the code is 'Safe' e.g. it will not be carrying out any external assembly access or other file accesss.
The code simply contains some stored procedures that will update/instert etc data from the database.
The question is, how do I actually deploy the code to a a remote server? Do i simply take the DLL and use CREATE ASSEMBLY code to set it up?
Furthermore, are there any security issues i need to consider when i deploy the assembly given that I have already set up the security to be 'Safe' ? e.g. is there anyway that a database can be locked down so that CLR code would not run irrespective of the safe setting.
As far as I understand it, SQL CLR code is ran under the SQL Server service account, so does this mean that if this user is locked down the code would not run?
Any clarifications or extra info would be greatly appreciated.
Peds
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Sep 16, 2007
I read about isolation levels... good, how can I set a proper isolation if I have 100 transactions... What is the aproche?:shocked:
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Aug 4, 2015
I have a table which has a recursive relationship to its self neither of the columns involved are FK columns
CREATE TABLE [dbo].[ix_Trace](
[Trace_Id] [uniqueidentifier] NOT NULL,
[Trace_BubbledTraceEnter_Id] [uniqueidentifier] NULL,
[Trace_EnterId] [uniqueidentifier] NULL,
[Trace_Application_Id] [uniqueidentifier] NULL,
[Trace_Session_Id] [uniqueidentifier] NULL,
....
Where Trace_EnterId is the parent ID and BubbledTraceEnter_Id is the child ID. My test case has nested trace lines that go down 5 levels, but when I delete the top trace line, only the child directly under it is deleted leaving the other 3 as orphans. Here's the trigger:
ALTER TRIGGER [dbo].[DTrig_xTrace]
ON [dbo].[ix_Trace]
FOR Delete
AS
BEGIN
SET NOCOUNT ON;
DELETE FROM ix_Trace
FROM ix_Trace INNER JOIN
deleted as dt ON ix_Trace.Trace_BubbledTraceEnter_Id = dt.Trace_EnterId
How can I make this cascade all the way down?
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Jan 12, 2007
lets say user1 is reading row1, then user2 reads and updates row1, when user1 is about to update row1 i want him to be informed that his copy of row1 have been updated, so he has now the options to either get the new version of row1 or cancel his update process.
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