SQL 2012 :: Should Use Views Or Create A Data Mart
Oct 9, 2015
our group is debating whether we should use views or data marts. WE have some huge queries that can have many joins up to 20 in some cases. One part of our group wants to use views to pull this data and another thinks we should create a data mart off an SSIS package and run it early every morning and then have the users access the data directly from there.
I am not really sure how a view would speed things up. If I have 20 users and they all call a view the view is created 20 times is that not correct? Since a view is basically just a stored sql statement (not a stored proc) I am not seeing how this is any more efficient.
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Aug 31, 2006
i want to create a data mart from an existing OLTP database. for example northwind or i will create an OLTP database. i dont know how i can create data mart from OLTP database. i want to learn that step by step. help me??? please!!
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Nov 1, 2006
Hi, an Operational Data Store is for short-term data storing (a few days at most) for providing real-time response to specific queries, but when you need to query about historical data you have to go down in the chain and build a data mart, is that true?
I have just one corporative database (which I need to real-time query and report) and I think that you need a data mart when you need to unify several departments that have different names for the same product for example, or when those departments are from different regions in the country but when you have a "common language" in the company do you need a data mart or you just have a ODS? If you have just an ODS does it work for historical data?
Now I think that the ODS could feed the data mart on a regular time basis (for example every week) that's the way you deal with long term historical queries? I also think that I'm in the first case of the 3 layouts proposed here http://www.informit.com/guides/content.asp?g=sqlserver&seqNum=166&rl=1 because I don't have several ODS to integrate in one data mart and I'm working with just one company data but I don't know if this layout handles (in real time response) the long term historical queries that the management is asking me for.
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Aug 6, 2007
The database maintenance on our data mart SQL server is causing problems. The re-index process causes too much file growth and the processes are unable to complete due to disk space constraints. I want to write a process to re-index the database, but handle this a single file group at a time and then shrink the file group before going to the next one. I'm looking to write a maintenance routine (stored procedure) that will get all of the tables from a file group and re-index them. Any general ideas would be greatly appreciated.
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Jun 10, 2014
How to create insert statements of the data from a table for top 'n' rows. I know we can create using generate scripts wizard, but we can't customize the number of rows. In my scenario i got a database with 10 tables where every table got millions of records, but the requirement is to sample out only top 10000 records from each table.
I am planning to generate table CREATE statements from GENERATE Scripts wizard and add this INSERT STATEMENT at the bottom.
EX : INSERT [dbo].[table] ([SERIALID], [BATCHID] VALUES (126751, '9100278GC4PM1', )
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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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Dec 2, 2013
I have created some dynamic sql to check a temporary table that is created on the fly for any columns that do contain data. If they do the column name is added to a dynamic sql, if not they are excluded. This looks like:
If (select sum(Case when [Sat] is null then 0 else 1 end) from #TABLE) >= 1 begin set @OIL_BULK = @OIL_BULK + '[Sat]' +',' END However, I am currently running this on over 230 columns and large tables 1.3 mil rows and it is quite slow. How I can dynamically create a sql script that only selects the columns in the table where there is data in a speedier manner. Unfortunately it has to be on the fly because the temporary table is created on the fly.
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Jun 6, 2000
When I create a view using Enterprise Manager, I can click on the 'Add Table' button to select a table. Is there any way I can tell EM that I want to include a table from another server?
Thanks,
Randy
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Jun 15, 2007
I am using SqlServer2005 and asp.net 2005. I have a large database for which I have to provide reports for it. I need a report that user will specify a date, and the report will be run, from this month & year and I will calculate the first day of the month and the last day of the month and these will serve as the input parameters for a long SELECT query.For my previous reports i've used views . But for this functionality i need a parameterized view, which i cant create.Please help me how to create a parameterized view.... Thanks in Advance...
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Jun 9, 2004
I want to allow a group of users to create views but not be able to create new tables or stored procedures... how can I do this ??
Thanks, John :eek:
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Sep 17, 2007
Hey
I am very new to database and have a question about views, that I hope someone can help me with, i am sure its simple:
I have to tables for storing different users, I want(for a log in function),to make a view that combine these to tables.
so all names stored in table1 under column customer_name, and all names stored in table2 under column name contact_name will in the view be stored under column username.
What shall a do?
Thanks for all help
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May 8, 2007
I am stuck on creating views using the variables. I keep on getting the 'CREATE VIEW' must be the first statement in a query batch error. I understand that views need to be the first statement, but I have a lot of views that need to reference specific variables - is there any way to do this?
The code I am using is as follows:
DECLARE @view varchar(MAX)
DECLARE @database varchar(30)
SET @database = 'KateTEST3'
--Insert views
SET @view = 'USE ['+@database+']
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON;
CREATE view [dbo].[userssupplier]
as
SELECT *
FROM dbo.Users
WHERE (User_Type = 4.0) OR
(User_Type = 5.2)'
EXEC(@view)
Thanks
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Feb 5, 2007
In SQL 2K...i need to write a script that writes a script that creates all views in the order that they are nested and I am feeling lazy. Does anyone have anything handy?For example if View_BOB says...CREATE VIEW VIEW_BOBASSELECT COL_1 FROM VIEW_JOHNI need the script to generate a script that creates View_JOHN before View_BOB.
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Mar 21, 2006
Hi there,
I'm new to SQL Server please help me, i want to create identity column(AutoNumber) when creating views.
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Jul 20, 2005
Hi,I am not getting option as 'new view' and 'new table' when I rightclick onviews and tables option in VisualStudio.net IDE server explorersqlservers database to create new objects.Looks like some setup issue in my database.Thanks for your help in advance.RgdsCV
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May 22, 2007
I have a pretty large database that has tables that will contain millions of rows of records. I will predominantly be using Views just to select the data. (I will not be performing any updates or inserts). I propose creating indexes on the views. My question is - if I create indexes on my views, do I have to create them on the tables as well? Is it good practice to create indexes on tables by default even if I am not going to be performing select statements directly on my tables but via my indexed views? Any advice is appreciated.
Thanks
Ran
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Sep 25, 2007
Can you create views within a stored procedure?
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Mar 21, 2005
Hi,
I'm working with few examples from a 70-315 exam prep book.
I'm trying to view the Table design... edit/ create views from VS. NET environment.
But when i right click on the View node under Data Connection tree i get only "Refresh" & "Properties". According to this book.. i should be able to create new views from here.
I'm working with a SQL Server 2000 local installation. VS .NET is connected to the DB, as i tried other examples and i'm able to read from the DB.
My SQL server installation is a 120 days eval installation... has this got anything to do with the behavior ??
I also reied to establish a connection with SQL server 'sa' login... i could connect, but again i wasnt able to create 'views' access tables design.
Any help would be appreciated.
Thanks.
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Oct 17, 2007
I am creating a view for the table:
bellus=# select * from host_application_definition;
id | type_value | connection_value | group_value | application_value | host
----+------------+------------------+-------------+-------------------+----
From the table meta_host_types;
id | value | types | name
----+-------+-----------+--------
1 | agm | host-type | Rencid
I would like to seperate value into type_value and connection_value, because it holds both values.
Any tip?
bellus=# d host_application_definition;
Table "public.host_application_definition"
Column | Type | Modifiers
-------------------+---------+--------------------------------------------------------------------------
id | integer | not null default nextval('host_application_definition_id_seq'::regclass)
type_value | integer |
connection_value | integer |
group_value | integer |
application_value | integer |
host | integer |
Indexes:
"host_application_definition_pkey" PRIMARY KEY, btree (id)
Foreign-key constraints:
"host_application_definition_application_value_fkey" FOREIGN KEY (application_value) REFERENCES appsmarteye(id)
"host_application_definition_connection_value_fkey" FOREIGN KEY (connection_value) REFERENCES meta_host_types(id)
"host_application_definition_group_value_fkey" FOREIGN KEY (group_value) REFERENCES meta_host_grouptypes(id)
"host_application_definition_host_fkey" FOREIGN KEY (host) REFERENCES master_hosts(id)
"host_application_definition_type_value_fkey" FOREIGN KEY (type_value) REFERENCES meta_host_types(id)
d meta_host_types;
Table "public.meta_host_types"
Column | Type | Modifiers
-------------+---------+---------------------------------------------------------------------
id | integer | not null default nextval('meta_types_application_id_seq'::regclass)
application | integer |
value | text |
comments | text |
types | text |
Indexes:
"meta_types_application_pkey" PRIMARY KEY, btree (id)
"meta_host_types_id_key" UNIQUE, btree (id)
"meta_host_types_value_key" UNIQUE, btree (value, application)
"meta_host_types_value_key1" UNIQUE, btree (value)
Foreign-key constraints:
"meta_types_application_application_fkey" FOREIGN KEY (application) REFERENCES appsmarteye(id)
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Feb 25, 2008
Is there a way to give someone the right to create only views and no other objects in a database? Currently I have given the individual ddladmin database rose, but would rather be more restrictive?
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Mar 18, 2008
I am having a hard time creating a view with some complex math to chow availability for rental items.
My tables are as follows:
OrderHeader
OrderID int,
Site int,
StartDate datetime,
EndDate datetime
OrderDetail
OrderDetailID int,
Site int,
OrderID int,
ItemName varchar(30),
Qty int
ShipHeader
ShippingID int,
Type int,
ActionDate datetime
ShipDetail
ShipDetailID int ,
ShippingID int,
OrderDetailID int,
Qty int
Transaction
TransactionID int,
Type int
PurchaseHeader
PurchaseHeaderID int,
Site int
PickupDate datetime,
ReturnDate datetime,
PurchaseDetails
PurchaseDetailsID int,
PurchaseHeaderID int,
ItemName varchar(30),
Qty int
I need a view that shows how many items will be available on a particular day for a specified item, date range and a specified €œSite€? (Office location. For example, NY, LA, CA, etc.)
The quantity actually owned is calculated from the Transaction table. Type, Qty are the columns. (type 1 is a purchase or addition and type 2 is a sale or subtraction. The quantity owned is the sum of all type 1s minus the sum of all type 2s.
The ShipHeader table also shows types. Type 1 is ship, Type 2 is return and Type 3 is lost.
Initially, all availability is calculated based on the FromDate and ToDate of our order headers. However, once the order has shipped, the availability should change to our ship and return dates in our ShipDetails table. Additionally, there is a PurchaseDetails table that shows items to be €œSub-Rented€? for a time frame. The PurchaseHeader table contains the FromDate and ToDate for these sub-rented items to be added to availability. If an item is kept beyond the due date set in the OrderHeader, then the item should show as unavailable from the FromDate through all future dates (as there is no way of telling when a late item will be returning. Once, the item is either returned or marked as lost, it should become available again as of that date.
The view should list dates in each row with the number of units available on that date.
Also, a second view needs to be created that shows the details for the dates listed in the first view. this is essentially a list of the orders or puchase orders that were used to calculate the number available.
I think this covers it.
As I said, this is a bit complicated. i understand what needs to be done but need assistance assembling the code to make it happen.
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May 13, 2014
Is there an easy way to convert Access Queries to SQL Views without doing it manually?I have used the Databse tool to migrate tables, but cannot see to find something similiar for queries.
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May 20, 2014
There are about 300 fields in a views.
How to reorder all fields by alphabet?
For example, from script of views like below:
select name, date, amount from order
re-order fields' name like below:
select amount, date, name from order
For about 300 fields view, how to code to re-order fields' name?
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Jul 13, 2014
I have a question regarding the locking behavior of indexed views. We have a 3rd party application and something like the following table:
CREATE TABLE [Person].[Person](
[BusinessEntityID] int NOT NULL,
[FirstName] varchar(20) NOT NULL,
[MiddleName] varchar(20) NULL,
[code]....
Also the 3rd party application uses an indexed view, which is based on the following query and has the same structure as the base table:
SELECT [BusinessEntityID],
[FirstName],
[MiddleName],
[LastName],
SUM([Quantity]) AS [SUMQuantity]
FROM [Person].[Person]
GROUP BY [BusinessEntityID], [FirstName], [MiddleName], [LastName]
The result is, that the indexed view has nearly the same data / entries as the base table. The indexed view is often queried like this:
SELECT SUM(SUMQuantity) FROM [vPerson] WITH(UPDLOCK, NOEXPAND) WHERE [BusinessEntityID] = 45 AND [FirstName] = 'test'
The base table is also queried very often with update locks (UPDLOCK). Because the indexed view is nearly just a copy of the base table and there is no performance gain (read), I would like to drop the indexed view. I'll then experience more locks / blocks, because now the queries are seperated on two objects.
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Feb 18, 2013
It is possible to create Analysis Services project (*.dwproj) in Visual Studio 2012 Data Tools?
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Jul 14, 2015
I am creating mateialized view but it is failing with error that it can't be schema bound.
The query I am working to create materialized view are having joins with different tables and function.
Is it possible to create Indexed views on user defined functions?
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Apr 24, 2007
Hi, all experts here,
Thank you very much for your kind attention.
I am wondering if there is any sense to create indexed views on single table? I simple want to improve the report query performance as most of the reports data are from a single table. As views most of the time are created as for joined across tables.
Thank you very much for your advices and I am looking forward to hearing from you shortly.
With best regards,
Yours sincerely,
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Aug 5, 2015
I am trying a create views that would join 2 tables:
Table 1: Has all the columns need by a view (
Name: Product
Structure: ID, Attribute 1, Attribute 2, Attribute 3, Attribute 4, Attribute 5 etc
Table 2: Is a lookup table that provides the names of columns
Name: lookupTable
Structure: tableName, ColumnName, columnValue
Values: Product, Attribute1, Color
Product, Attribute2, Size
Product, Attribute3, Flavor
Product, Attribute4, Shape
I want to create a view that looks like
ID, Color, Size, Flavor, Shape
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Oct 13, 2015
I have a few databases that are using Partitioned Views in order to manage the table sizes and they all work well for our purposes. Recently I noticed a table that had grown to 400+ million rows and want to partition it as well, so I went about creating new base tables based on the initial table's structure, just adding a column to both table and primary key to be able to build a Partitioned View on them.The first time around, on a test system, everything worked flawlessly but when I put the same structure in place on the production system I get the dreaded "UNION ALL view 'DBName.dbo.RptReportData' is not updatable because the primary key of table '[DBName].[dbo].[RptReportData_201405]' is not included in the union result. [SQLSTATE 42000] (Error 4444)" error.
I have searched high and low and everything I see points to a few directives in order for a UNION ALL view to be updatable:
- Need a partitioning column that is part of the primary key
- Need a CHECK constraint that make the base tables exclusive, i.e. data cannot belong to more than one table
- Cannot have IDENTITY or calculated columns in the base tables
- The INSERT statement needs to specify all columns with actual values, i.e. not DEFAULT
Well, according to me, my structure fulfills these conditions but the INSERT fails anyway. CREATE scripts below scripted from SQL Server. I only modified them to be on a single row - it is easier to verify that they are identical in a text editor that way.
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
[code]....
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Feb 26, 2008
Hi, i'm wondering which is the best way to search data in a SQL Server.
I reach data using Data Sources and Data Views and also with OLE DB Source with a Data access mode: Named query.
I have to write the data into a Flat File. So, does any one knows which is the best practice for this? Or any one of the two are good choices?
Thanks for your help.
Beli
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Apr 3, 2006
Fellow database developers,I would like to draw on your experience with views. I have a databasethat includes many views. Sometimes, views contains other views, andthose views in turn may contain views. In fact, I have some views inmy database that are a product of nested views of up to 6 levels deep!The reason we did this was.1. Object-oriented in nature. Makes it easy to work with them.2. Changing an underlying view (adding new fields, removing etc),automatically the higher up views inherit this new information. Thismake maintenance very easy.3. These nested views are only ever used for the reporting side of ourapplication, not for the day-to-day database use by the application.We use Crystal Reports and Crystal is smart enough (can't believe Ijust said that about Crystal) to only pull back the fields that arebeing accessed by the report. In other words, Crystal will issue aSelect field1, field2, field3 from ReportingView Where .... eventhough "ReportingView" contains a long list of fields.Problems I can see.1. Parent views generally use "Select * From childview". This meansthat we have to execute a "sp_refreshview" command against all viewswhenever child views are altered.2. Parent views return a lot of information that isn't necessarilyused.3. Makes it harder to track down exactly where the information iscoming from. You have to drill right through to the child view to seethe raw table joins etc.Does anyone have any comments on this database design? I would love tohear your opinions and tales from the trenches.Best regards,Rod.
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May 3, 2004
Hello all,
Please help....
I have a text file which needs to be created into a table (let's call it DataFile table). For now I'm just doing the manual DTS to import the txt into SQL server to create the table, which works. But here's my problem....
I need to extract data from DataFile table, here's my query:
select * from dbo.DataFile
where DF_SC_Case_Nbr not like '0000%';
Then I need to create a new table for the extracted data, let's call it ExtractedDataFile. But I don't know how to create a new table and insert the data I selected above into the new one.
Also, can the extraction and the creation of new table be done in just one stored procedure? or is there any other way of doing all this (including the importation of the text file)?
Any help would be highly appreciated.
Thanks in advance.
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Aug 4, 2015
I would like to create a procedure which create views by taking parameters the table name and a field value (@Dist).
However I still receive the must declare the scalar variable "@Dist" error message although I use .sp_executesql for executing the particularized query.
Below code.
ALTER Procedure [dbo].[sp_ViewCreate]
/* Input Parameters */
@TableName Varchar(20),
@Dist Varchar(20)
AS
Declare @SQLQuery AS NVarchar(4000)
Declare @ParamDefinition AS NVarchar(2000)
[code]....
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