Can Obiee connect to snowflake?

Posted on by David Darling

Can Obiee connect to snowflake?

Deploy the Snowflake JDBC driver on OBIEE to provide real-time reporting across the enterprise. The CData JDBC Driver for Snowflake is a standard database driver that can integrate real-time access to Snowflake data into your Java-based reporting server.

What is cardinality in Obiee 11g?

Cardinality is one of the key defining parameter in logical joins. Cardinality relation one-to-many means that each row in first logical dimension table there are 0, 1, many rows in second logical table.

Is snowflake schema normalized or denormalized?

Normalization of dimension tables The snowflake schema is a fully normalized data structure. Dimensional hierarchies (such as city > country > region) are stored in separate dimensional tables. On the other hand, star schema dimensions are denormalized.

Can OAS connect to snowflake?

In OAS you can select Snowflake as the Database Type. In OBIEE 12c, you can select ODBC Advanced as the database type. This choice affects which Database Features are enabled in the next tab by default, but we will customize these options in the next section.

Can we join two fact tables in Obiee?

Generally speaking, you shouldn’t do fact to fact joins. The first technique is to use conformed dimensions to have OBI generate 2 queries and join the results. If you must, then treat them in a single Fact Logical Table Source as you would any other LTS.

Is snowflake a 3NF?

In the snowflake schema, dimension tables are normally in the third normal form (3NF). The snowflake schema helps save storage however it increases the number of dimension tables.

How do you connect snowflakes in Oracle?

Let us go through these steps to connect Oracle to Snowflake in detail.

  1. Step 1: Extract data from Oracle to CSV using SQL*Plus.
  2. Step 2: Data type conversion and formatting.
  3. Step 3: Stage Files to S3.
  4. Step 4: Copy staged files to Snowflake table.

How do you connect a snowflake to a data warehouse?

Connect to Snowflake Data Warehouse

  1. On the Home page, click Create, and then click Connection.
  2. Click Snowflake Data Warehouse.
  3. Enter a Connection Name.
  4. In Hostname, enter the host account name using the following format.
  5. For Username and Password, enter user credentials with access to the Snowflake data source.

What is BMM layer in Obiee?

The Business model mapping layer is the second layer of OBIEE RPD which contains the data mart which contains one of the functionality of the business. To create business model in RPD just right click on BMM layer (anywhere in the space of BMM layer) and select the option as New Business Model.

Is high cardinality good?

High cardinality refers to a column that can have many possible values. For an online shopping system, fields like userId , shoppingCartId , and orderId are often high-cardinality columns that can take take hundreds of thousands of distinct values. Similarly, requestId might be in the millions.

Is snowflake faster than star schema?

Star Schema has a faster query time than Snowflake Schema because they need a single join between the fact table and its other attributes in dimensional tables. Snowflake Schema needs complex joins to dimensional tables with their own sub-dimensional tables to execute a query which slows down the performance.

What are the disadvantages of snowflake?

Cons of Snowflake Data Warehouse

  • No support for unstructured data at the moment. Snowflake currently only caters to structured and semi-structured data.
  • Only bulk data load. When migrating data from data files to Snowflake files there is much support and guidance on bulk data loading.
  • No data constraints.

Can a star schema have multiple fact tables?

Star schema contains only one fact table.

Can we join one fact table to another fact table?

The answer for both is “Yes, you can”, but then also “No, you shouldn’t”. Joining fact tables is a big no-no for four main reasons: 1. Fact tables tend to have several keys (FK), and each join scenario will require the use of different keys.

What is difference between star schema and snowflake schema?

A star schema contains both dimension tables and fact tables in it. A snowflake schema contains all three- dimension tables, fact tables, and sub-dimension tables. It is a top-down model type.

What is snowflake schema example?

In computing, a snowflake schema is a logical arrangement of tables in a multidimensional database such that the entity relationship diagram resembles a snowflake shape. The snowflake schema is represented by centralized fact tables which are connected to multiple dimensions.

How do you connect to a Snowflake database?

To connect to Snowflake create new documentation by clicking Add documentation and choosing Database connection. On the connection screen choose Snowflake as DBMS….Connecting to Snowflake

  1. Host – provide a host name or address where a database is on.
  2. Port – change the default port of Amazon Redshift instance if required.

How is data stored in Snowflake?

Snowflake optimizes and stores data in a columnar format within the storage layer, organized into databases as specified by the user. dynamically as resource needs change. When virtual warehouses execute queries, they transparently and automatically cache data from the database storage layer.

What is physical layer in Obiee?

The OBIEE Repository is comprised of three layers. A very simplistic summary is below: Physical layer: Defines all database or data source connections (user id and passwords are entered and stored here), the physical table and columns, primary and foreign key relationships.

What is obiee for Snowflake data warehouse?

You just configured Oracle Business Intelligence Enterprise Edition (OBIEE) to connect to your freshly loaded Snowflake Data Warehouse instance and you’re feeling pretty good.

Which connection pool does obiee use for each session?

When running queries against a data source, OBIEE will use the first valid connection pool in the physical layer of the RPD that a user has access to. Consequently, we can control which connection pool OBIEE uses for each session by selectively granting access for application roles.

How can I run a snowflake query prior to running the workload?

When running queries manually or programmatically using one of the Snowflake connectors, the USE WAREHOUSE command can be issued prior to running the workload. How can this be done in OBIEE? Glad you asked!

How do I find the first occurrence of a snowflake role?

Enter the following ugly looking SQL statement in the Initialization Block Data Source: NQ_SESSION.ROLES is a session variable that returns a semicolon delimited string of roles assigned to the user. The SQL statement above searches the string for the first occurrence of Snowflake and returns the name of the role.