SQL 2012 :: Hybrid Model Database Design
May 14, 2015
I am using sql2012 se and we want to use couchbase to store some data as documents. So the database will be Hybrid(partly SQLServer and Partly couchbase). However the database is still in the design phase. What are the things that we should keep in mind when designing this database from a design perspective? Our database which was completely SQLServer based(RDBMS) was using GUIDs everywhere based off NEWID() and prime goal is to get rid of GUIDs for the most part.
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Jun 16, 2008
Hi there
We are thinking to create a small scale of the "Software On-Demand" model for Support Ticket Management System which means that the client can login to do a support tick and shared the application using the same URL.
Couple options though:
1) We design by table such has a SUPPORTS table with has a foreign key of the ClientID from CLIENTS table. This will cover that client can only can a specific data within the SUPPORTS table.
2) Alternatively, create a dynamic table which is created specifically for "Client B" for instance for SUPPORT table and it will be called such as ClientBSupport table. Something that can be common it will be shared such as like look-up table.
Couple consideration though:
1) Considered client wanting to backup this table. Obviosly it has too querying based on the client id to get the right data.
2) Security withing that table. Is the data needs to be incrypted ... I guess this is expensive excercise.
3) Possibly have a model that access to this table in querying directly etc etc.
4) If the Support table is getting larger and larger and it's not fair for small client accessing the small information which has equal to the one that has big records? Cause it's sharing table.
Any inputs I am really appreciated.
Thanks
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Dec 11, 2007
Hi,Facts:I created a database to support an application that tracks events ondifferent objects. The two main tables are tbl_Object andtbl_EventLog. Each table has unique ID and on the tbl_EventLog thereis FK for a record in the tbl_Object. The events are inserted all thetime for the same or different objects from the tbl_Object. There areabout 600,000 objects in the tbl_Object and 1,500,000 (and growing)events in tbl_EventLog.Question:The user often wants to know what the last event was for a specificobject.What is the best way of retrieving the last event?Should I simply do a max(eventdatetime) on a specific object? orShould I add a LastEventID column to tbl_Object and update it everytime a new event is inserted? or any other way to implement it?I chose the second method because I didn't think it made sense searchthe event table everytime the user wants to know the last event, but Iwanted to know what the experts thought.Please let me know what you think.Thank you,Oran Levin
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Oct 15, 2015
I have one database which is multi tenant, every table has tenant id and every tenant is mapped with separate file group. Now can I achieve below :?
1. Can I take the backup of only one tenant and restored in separate database?
2. Can I takeout the data of one tenant quickly?
3. Can I undo the data of a particular tenant with 2 days older data without disturbing the other tenant ?
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Aug 12, 2015
Been practicing DR strategies with a test SQL instance by following the scenarios listed here: [URL] ....
> Took a backup of the Model database
> Stopped SQL Server
> Deleted model database data & log file
> Started SQL Server and it obviously wouldn't start because TempDB needs a model database present.
> Started SQL instance with trace flags 3608 & 3609
> Connected to SQL instance using command prompt.
> Issued restore command but was met with this error:
Shared Memory Provider: The pipe has been ended.
Communication link failure
And found this in the SQL log..
2015-08-12 16:21:32.83 spid51 Starting up database 'tempdb'.
2015-08-12 16:21:36.88 spid51 Error: 3456, Severity: 21, State: 1.
2015-08-12 16:21:36.88 spid51 Could not redo log record (59:136:21), for transaction ID (0:0), on page (1:20), allocation unit 458752, database 'tempdb' (database ID 2). Page: LSN = (30:165:3), allocation unit = 458752, type = 1.
[Code] .....
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Apr 30, 2014
choosing a primary key for the database which i am designing.
I have few tables which contains 5 -15 fields out of it 3 - 9 columns combined to form the uniqueness of the row.
All are un-related tables. Three parent tables connect with 20 child non-related child tables.
I believe it would not be a wise choice to choose 3 to 9 fields for primary key. But if i use an auto increment as a key will there be of any use as it might never be used to fetch rows. Then why do i still have to go with that?
Or Is it ok to create a primary key of upto 5 attributes?
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Jun 5, 2014
We have a Silverlight based application which currently supports only one production version. Idea is to support three concurrent versions of the same application and user will switch to the newer versions based on their interest or they can still continue with the older version.
We still have to use the existing database for all these three versions.
What is the best way to architect this so that we can differentiate the code between the versions and still keep the data in sync and run all the versions in parallel.
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Apr 22, 2008
I have an opportunity to rebuild a database model with the express purpose of improving query performance. So given the following I have a few questions.
Table A (~500M records)
Primary Key Field (int)
Field 1 (varchar)
Field 2 (varchar)
Field 3 (varchar)
Field 4 (varchar)
Field 5 (varchar)
Table B (1B+ records)
Primary Key Field (int)
Foreign Key Field (int)
Field 1 (varchar)
Field 2 (varchar)
Field 3 (varchar)
Field 4 (varchar)
Field 5 (varchar)
* Assumed: Tables are inner joined on all queries. The database is readonly.
-- Most of my lookups are based on querying Field 1 of Table A. The data content of Field 1, Table A is 90% unique.
1) Would it be more beneficial to put the clustered index on Field 1 instead of the PK field in Table A?
2) Can an Identity column be non-clustered?
3) Alternatively, would it be beneficial to build a separate lookup table with just the PK & Field 1 of Table A, with a clustered index on the lookup table Field 1 which I join on Table A? (did that make sense?)
-- I have a secondary lookup that performs queries on Fields 1, 2, 3, 4 & 5 of Table B
1) Would it be more beneficial to create an additional indexed lookup column of the concantenated values of Fields 1-5 of Table B versus a covering index of all 5 columns?
2) Does a clustered index have to be unique?
3) Would a clustered index be more beneficial over Fields 1-5 or the special lookup column versus the PK or FK fields?
4) Would creating a special lookup table with just the requisite fields be more beneficial?
An extra question. The existing data model uses the CHAR datatype for all columns less than 9 characters wide and the columns are set to allow nulls. This requires every select statement to COALESCE() and RTRIM() all these columns. I intend to make all (affected) columns VARCHAR, NOT NULL with a default value of a 0-length string.
Will this enhance query performance?
Thanks in advance for any insight.
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Jul 27, 2015
I never created table on the basis of Data model diagram . I have to create the 3 table on the basis of given Data model diagram. There are 3 tables
1.md_geographyleveltype
2.md_geographylevel
3.md_geographylevelxref
I have tried to create 2 table but unable to create 3rd table.
CREATE TABLE [dbo].[md_geographylevel](
[type_key] [int] NOT NULL,
[geog_key] [int] NOT NULL,
[Type_description] [nvarchar](50) NULL,
[Store_flag] [nvarchar](10) NULL,
[Type_short_desciption] [nvarchar](50) NULL,
[Code] ....
I am getting difficulties to create table script for table
md_geographylevelxref
How to create the table create script for
md_geographylevelxref
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May 4, 2006
Ok here is the deal...We have our current dev box running SQL 2000 SP3We have two new desktop boxes that we are using as a test, they are both running SQL 2005 SP1The Dev Box = PUBLISHERDesktop #1 = DISTRIBUTORDesktop #2 = SUBSCRIBERAll three SQL Servers are using the same Domain Account to run SQL Agent and SQL Server processes.When I try to create a publication from the publisher, while running the sp_addpublication step through the UI (or thru SQL Query Analyzer) I get the following error message:Msg 15404, Level 16, State 10, Procedure sp_grant_publication_access, Line 136Could not obtain information about Windows NT group/user 'crumpte', error code 0xffff0002.So as a test I tried using our subscriber box as the publisher and had it point to the same distributor box to act as a distributor - and the publication was created fine.It seems to be an issue using SQL 2k as the Publisher and SQL 2005 as the distributor. From the research that I have done, I found this KB article:http://support.microsoft.com/default.aspx?kbid=830596Which essentially says to install the latest SP for SQL 2k, which would be SP4, in the past I know there were issues with AWE memory allocation.Q1. Has SP4 been hotfixed to resolve this AWE issue?Q2. Has anyone here successfully setup replication from SQL 2k -> SQL 2005 using SQL 2005 as the distributor?Thanks!
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Jan 8, 2007
I have created the plication and push subscription on SQL 2000 by running sql scripts. I can view it through management console already.
but on SQL 2000 server, i dont' know how to start the snapshot agent and how to synchronize explicitly. In 2005, there is a system sp
sp_startpublication_snapshot @publication = @publication
can do the job. can you tell me how to do the same in the sql 2000?
additionally, I tried to use RMO to implement the replication. but it seems some of the classes only support 2005. doesnt' it means RMO can't be used to program on hybrid replication environment?
plz reply. thanks
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Nov 29, 2006
I am using BI Dev Studio for SS2005 in a research (as opposed to a production) environment. Often I want to compare the results of multiple models using the same attributes. If I switch to a different model, the Design view completely resets. Is there any way to retain the same field names with different models in the Design view?
My current workaround is to give my models similar names with AR, DT, CL, LOG, NN suffixes and make global changes in the DMX.
I have consulted the following without finding an answer:
http://msdn2.microsoft.com/en-us/library/ms178445.aspx
http://msdn2.microsoft.com/en-us/library/ms175642.aspx
http://msdn2.microsoft.com/en-us/library/ms175678.aspx
http://msdn2.microsoft.com/en-us/library/ms175637.aspx
Thanks for your help,
Sam
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Dec 5, 2005
Running 2005 Beta 3 Refresh. When I first deploy, it works fine. Subsequent deployments yield the following error:
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May 13, 2015
I have a scenario like below
Product1
Product2 Product3
Product4 Product5
Product1 1
1 0 0
1
Product2 1
1 0 0
1
Product3 0
0 1 1
0
Product4 0
0 1 1
0
Product5 1
1 0 0
1
How to design tables in SQL Server for the above.
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Jun 17, 2014
I have a question about partitions in both SQL Server table and Tabular Model. I started to use Tabular Model recently.
I need to partition a table that collects daily rows for different clients.
The natural partition key is a combination of clientID+dateID (something like CL-YYYYMMDD)
I created a configuration table with a primary key PartitionID IDENTITY(1,1) , that contains also the field clientID and dateID
Every day I add a new row in it and I get a partitionID for the new client and date
Then I created a partitioned fact table using PartitionID as the partition field, using the partition function and the partition schema as well.
The daily client data is inserted in the partitioned table using the partitionID
Everything works fine, and the data are loaded correctly into the partitioned fact table.
Then I created a Tabular Model where the fact table is the partitioned table, and I created tabular model partitions using something like "select <field list> from PartitionedTable where partitionID = <partitionID>"
In this way, every day I load partitioned data in both sql server and tabular model. I have two dimensions, client and calendar
Now my question is: when I browse the Tabular Model, and I'm selecting a specific dimension date and dimension client, am I using the partitionID index correctly?
Or should I put in the tabular model partition query something like "select <field list> from PartitionedTable where clientID = <clientID> and dateID = <dateID>"? In this case is still working the partitionID index? How can I check it?
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Feb 13, 2002
Ok, I'm doing a football database for fixtures and stuff. The problem I am having is that in a fixture, there is both a home, and an away team. The tables as a result are something like this:
-------
Fixture
-------
fix_id
fix_date
fix_played
----
Team
----
tem_id
tem_name
-----------
TeamFixture
-----------
fix_id
tem_id
homeorawayteam
goals
It's not exactly like that, but you get the point. The question is, can I do a fixture query which results in one record per fixture, showing both teams details. The first in a hometeam field and the second in an away team field.
Fixture contains the details about the fixture like date and fixture id and has it been played
Team contains team info like team id, name, associated graphic
TeamFixture is the table which links the fixture to it's home and away team.
TeamFixture exists to prevent a many to many type relationship.
Make sense? Sorry if this turns out to be really easy, just can't get my head around it at the mo!
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Mar 29, 2015
I am trying to learn building SSAS tabular model. While following a tutorial I need to add a column to an existing table but for some reason the ADD Column option (insert column in other menu is also not appearing) is greyed out.
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Jul 27, 2015
I never created table on the basis of Data model diagram . I have to create the 3 table on the basis of given Data model diagram. There are 3 tables
1.md_geographyleveltype
2.md_geographylevel
3.md_geographylevelxref
I have tried to create 2 table but unable to create 3rd table. Need to review the script of first 2 table and to create table script for 3rd table.
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Jul 9, 2015
I have an existing project that I have added a simple text file. I am using the Project Deployment Model for this project. I save the project, close it and open the project and the file is there under the Miscellaneous folder. I successfully deployed the project to the server. When I retrieve the project using the Integration Services Import Project Wizard, all of my package modifications are there and the packages up to date but the txt file I added to the Miscellaneous folder is not there.
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Nov 24, 2014
How to write Stored Procedures to load the Data Model from OLTP to DWH ?
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Oct 17, 2014
I am looking to store the different forms and data in our database. We have several different forms and contains different information. I am looking for different approaches to model this table structure.
Also, I need to make sure the table structure will allow for new forms.
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Feb 19, 2008
Hi All
I have the following questions regrading T-SQL
1. How to assign database role "db_owner" to model database using T-SQL?
2. How to grant a window login public access to master database
Thanks.
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May 5, 2014
I have an ordering database with several tables that store data of orders belonging to a wide variety of clients. There is a generic report that I need to run which outputs the same data elements. However the criteria to select these orders will vary widely between each client. For e.g.
i) for client# 1 it could be all orders that are still open after 30 days of placing an order
(
OrderStatus = 'Open'
AND
GetDate() - OrderCreationDate >= 30
)
ii) for client# 2 it could be all orders that have been completed 60 days or earlier
(
OrderStatus = 'Completed'
AND
GetDate() - OrderCompletedDate >= 60
)
iii) for client# 3 it could be a combination of different things (all orders in West Region that are in hold status for more than 10 days + all orders in Eastern Region that are in shipping and are expected to be delivered in the next 2 days + all completed orders for the rest of the regions).
(
OrderRegion = 'West'
AND
OrderStatus = 'Hold'
AND
GetDate() - OrderHoldDate >= 10
[code].....
I want to have a stored procedure that selects all data and dynamically attach the where condition at the end for filtering. This way I wouldn't have to worry about any additions/changes that are made to the selection criteria. I can build an interface for admins who can use the UI to maintain the selection criteria and not worry about any code changes to accommodate it. I would like to design a table that holds this criteria. At this point in time, I am thinking of using key value pairs (Column Name, Column Value) but I am not sure how to implement multiple logical operators.
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Oct 29, 2014
I'd like to create a table that will store different order items. Several order items make up one single order. Order items can have 0 or more children (max depth will never be deeper than one). Order items can have up to 150 attributes/values. The way I think this should be done is using XML column instead of the EAV type of model. My table structure currently looks like this:
* child_order_item_id (PK)
* parent_order_item_id (FK to child_order_item_id)
* order_id (FK to Order table)
* product_id (FK to Product table)
* price
* attribute_XML
How my attribute_XML should look like or how to validate the xml.
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May 22, 2008
Hi, I am trying to create an app that will work exactly like the inbox section in face book.
Do you have any database model I can use as a reference?
it works based on threads.
I am having issues with data redundancy any help will be appreciated.
Thanks
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Oct 19, 2015
I need to develop a language specific dwh, meaning that descriptions of products are available from a SAP system in multiple languages. English is the most important language and that is the standard. But, there are also requirements of countries that wants productdescriptions in their language.
Productnr Productdesc Language
1 product EN
1 produkt DE
One option is to column the descriptions, but that is not very elegantly. I was thinking of using bridge tables to model this but you have to always select a language in a filter (I think)..
I'm thinking of a technical solution, such that when a user logs on, the language is determined and a view determines whether to pick a certain product table specific for a certain language. But then I don't have the opportunity to interchange the different language specific fields in a report (or in my case PowerPivot).
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Apr 25, 2008
We have the following scenario,
We have our Production server having database on which Few DTS packages execute every night. Most of them have Bulk Insert stored procedures running.
SO we have to set Recovery Model of the database to simple for that period of time, otherwise it will blow up our logs.
Is there any way we can set up log shipping between our production and standby server, but pause it for some time, set recovery model of primary db to simple, execute DTS Bulk Insert Jobs, Bring it Back to Full recovery Model AND finally bring back Log SHipping.
It it possible, if yes how can we achieve this.
If not what could be another DR solution in this scenario.
Thanks Much
Tejinder
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Apr 2, 2015
So I have a query that need to find the most recent datetime record each day for a customer. So I have a query that looks like this:
SELECT
dhi.[GUID],
dhi.[timestamp],
la.[bundle_id],
dhi.[value]
FROM
[dbo].[DecisionHistoryItem] as dhi WITH(NOLOCK)
[Code] ....
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Oct 29, 2015
I actually work in an organisation and we have to find a solution about the data consistancy in the database. our partners use to send details to the organisation and inserted directly in the database, so we want to create a new database as a buffer database to insert informations from the partners then make an update to the main database. is there a better solution instead of that?
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Sep 27, 2000
How can I move the Model database to another location (i.e. from one drive / file location to another)?
I tried sp_detach_db (to be followed up with a sp_attach_db statement) but it rejected it because Model is a "system" database.
I tried (and it failed with a "Modify file command failed" message):
ALTER DATABASE model
modify file
(NAME='modeldev',FILENAME='f:MSSQL7DATAmodel.MDF')
I could not locate any help about moving model in books online (BOL).
Any ideas?
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Jun 22, 2006
I have a question.
I have a database on Recovery model FULL, i do know that i have to use a Complete Backups and Log backups for it, my question is
If i made a Complete backup, what happens with the transaction log? same size? i mean need a backup log to clean it ? .
A complete backup on SQL Server doesn't inclued a log backup?
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Jun 2, 2004
How do I change the Database owner for a MODEL database?
When I open the properties for a Model database, it shows "UNKNOWN" as the database owner, and I can't run the command 'sp_changedbowner 'sa' as it's not allowed to run on master, model, and tempdb.
Any help?
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Dec 5, 2007
I am receiving this message in my MOM Server:
The system stored procedure sp_helpdb, which is used to gather information about the databases, has returned an error that may indicate that it cannot determine the db owner for the database [model]. Here are the details: sp_helpdb @dbname='model' on SQL Server Instance: INSTANCENAME. Error number: 515, Error Information: [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot insert the value NULL into column '', table ''; column does not allow nulls. INSERT fails.
So, I run this script in the Master DB:
select name, suser_sname(sid) from master.dbo.sysdatabases where suser_sname(sid) is NULL
And I get the result that the db_owner is set to NULL!
I know that it is not possible to change the DB Owner of the model database but is there any workaround to solve this without reinstalling or similar solutions?
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