A database system optimised for reporting, particularly in aggregate. Often, but not always implemented using a star schema.

learn more… | top users | synonyms

0
votes
1answer
239 views

What are good resources on data modelling for business intelligence? [closed]

We are a SaaS startup offering purchase & procurement solutions. The data model for operational transactions has been created (relational DB). We also want to offer analytics on those transactions ...
0
votes
2answers
130 views

Query to return fields of distinct values per key

In the process of building a data warehouse we are creating some aggregation tables for a reporting engine. We would like to build a single aggregation table from the fact table that can exist as list ...
0
votes
2answers
271 views

SQL Server 2005 replication for a data warehouse

We are trying to implement some kind of Data Warehouse at my current employer. Most of our data is in a SQL Server 2005, but we might also integrate some Access databases and some databases in a SQL ...
0
votes
1answer
284 views

Benefits of using Staging Database while designing Data Warehouse [closed]

I am in process of designing a Data Warehouse Architecture. While exploring various options to Extract data from Production and putting into Data Warehouse, I came across many articles which mainly ...
0
votes
1answer
44 views

How Many Rows om Int and Big Int [closed]

How many rows does datatype int and big int retrieve in their table when you work with fact table in SQL server?
0
votes
2answers
150 views

avoiding unique key collisions across tables

This might be related to the idea of data warehousing, but i'm not sure, though it is extreme theory. We have a table where records get written to first, let's call it tbl_recording which looks like: ...
0
votes
1answer
120 views

Dimensional model or Relational model for data warehouse? [closed]

I have a pretty trivial questions in data warehouse, I know we use Dimensional data model to construct data marts and use Relational data model in staging area. What data model technique we use to ...
0
votes
1answer
40 views

Oracle scheduler chain priority in data warehouse applications

The scenario is as follows: We have a data warehouse type application that relies on the Oracle job scheduler and a Chain. This chain is responsible for generating materialized views (caches) that ...
0
votes
1answer
49 views

Override Dimension Column Value

I have a dimension with a column called 'Type'. There is a list of default 'Types' in this dimension. However, this 'Type' column can be overriden. i.e. each user can replace the default value with ...
0
votes
1answer
53 views

Beginning Data Warehouse Design [closed]

I am beginning to develop a Data Warehouse. The data does not already exist in a relational database. Instead it will be sourced from various 3rd party vendors. The data requirements have been drawn ...
0
votes
1answer
210 views

Data Warehouse - Slowly Changing Dimensions with Many to Many Relationships

As an example, let's say I have a fact table with two dimensions and one measure FactMoney table ProjectKey int PersonKey int CashAmount money The two dimensions are defined like this: ...
0
votes
1answer
2k views

SSIS convert DT_WSTR to date

I'm new to SSIS trying to covert data types. I'm pulling data from Google Analytics and loading data into a SQL 2008 database. The date column from Google analytics appears as "DT_WSTR" and the values ...
0
votes
1answer
202 views

How to simplify schema for multi database / hundreds of millions of rows data set

We currently have a MySQL data set that was started about 10 years ago that aggregates a log of data, and accumulates millions of rows each month. The people that developed our system started ...
0
votes
1answer
189 views

Using N-Tier in Business Intelligence

I have read that you also can apply N-Tier for Businesss Intelligence based on these criteria: *Presentation *Functional logic *Data What is your experience when you are using N-Tier? // ...
0
votes
1answer
41 views

Database design suggestions for a data scraping/warehouse application?

I'm looking into the database design for a data warehouse kind of project which involves a large number of inserts daily. The data archives will be further used to generate reports. I will have a ...
0
votes
1answer
20 views

Constellation Schema; Relationships between fact tables

What are acceptable types of depedendcies between facts in a multiple-fact schema? Conceptually talking, As you know a Multi-Dimensional Model may have multiple facts (like in a constellation ...
0
votes
0answers
17 views

How to ensure on Oracle RAC One Node that the OWB control service is started on the active node after a planned relocate or unexpected fail-over? [duplicate]

I followed the document 'How To Install a Warehouse Builder 11g Repository on a RAC' (Doc ID 1571166.1) to set up the OWB repository (11.2.0.4) on my Oracle RAC One Node system. Because it's a RAC One ...
0
votes
0answers
11 views

Does data guard support Oracle Warehouse Builder?

Does data guard support Oracle Warehouse Builder (both 11.2.0.4)? If not, what is the procedure to setup/configure my OWB project (repository, workspace, control center service...) on the standby ...
0
votes
0answers
10 views

When there is a Type 1 and type 2 SCD in a dimension table, how are updates to the type 1 column handled after the type 2 column is updated?

Eg: ID Type1SCD Type2SCD FromDate todate 1000 100 ABC 01-JUL-2014 NULL Now, Type2SCD is updated ID Type1SCD Type2SCD FromDate todate 1000 100 ABC 01-JUL-2014 12-JUL-2014 ...
0
votes
1answer
28 views

How to design and implement a datawarehouse using oracle data integrator 12c?

I want to design and implement a datawarehouse using oracle products. The most recently documented product to do that is Oracle Warehouse Builder 11g R2. But when installing, oracle database 12c, OWB ...
0
votes
1answer
46 views

Compare two similar Postgres databases for differences

I occasionally download publicly available data sets in the form of Postgres dBs. These datasets are updated/modified/expanded over time by the repository host. Is there a Postgres command or ...
0
votes
1answer
44 views

apply cdc to existing data warehouse

I'm building an education data warehouse. I have various dimensions that i would like to track changes to i.e. DimStudent, DimClass, DimCollege, DimExamPaper etc. etc. My solution currently drops ...
0
votes
0answers
71 views

Is there better way to design SQL tables

I need to design a quick application for small warehouse. I just want to check if there is a better design approach. I am using polymorphic associations for comments tables. Business Rules If ...
0
votes
0answers
42 views

Running materialized view refresh in parallel

I have a large materialized view that is refreshed periodically (complete refresh) and I would like to do it in parallel. I can already run the query part in parallel but the problem is (much slower) ...
0
votes
0answers
71 views

MySQL: Error 1118 using create table select and barracuda file format

We want to create the equivalent of some materialized views in a read-only slave for really performant reporting. The queries used to generate these tables span 19 tables with a fair number of ...
0
votes
0answers
80 views

How much RAM do I need?

Let's assume a query like the following as typical: select A.`date` as `date`, count(*) as N from A as A join B as B on B.id = A.b_id join C as C on C.id = B.c_id join D as D on D.id = ...
0
votes
2answers
119 views

Daily snapshot fact table

I have a list of products per costumer. Costumers can delete or add products to their list. I want to know in each day what is the list of products (and count) by costumer. My first approach is to ...
0
votes
1answer
128 views

SQL Server 2012 for data warehouse [closed]

I have to develop a data warehouse using SQL Server 2012. I'm confused about the release I could use... Standard or Enterprise? The database server will have 16 or 32 GB of RAM and a Quad-Core CPU. ...
-1
votes
1answer
99 views

data warehouse construction from mdf and ldf file via etl

I have sample data warehouse stored in the form of mdf and ldf format. I want to use any ETL tool to extract data and then load datawarehouse on the specified database with username, password and ...
-5
votes
1answer
152 views

how to being building a data warehouse [closed]

We have a ERP system that uses a DB in postgres, each table has many rows and we want to build data warehouse (data warehousing). Also we want to add BI using ETL where would begin? would use schemes ...
-7
votes
3answers
227 views

Business Intelligence = Technical OR Business Project? [closed]

Do you consider a project of Business Intelligence to be a technical or business project?