How do you join 2 fact tables?
The idle way to connect 2 fact table by a Dimension table.. create a Unique Dimesion table from your fact table then make one to many relationship.. for better result please post your power bi model and exact requirement. If it is your solution then please Accept it as solution and please like.
Can a fact table link to another fact table?
No, it’s not OK to directly link fact tables. First, if you correctly model your fact tables, you won’t be able to link them in a meaningful way. The only exception is fact tables that have 1:1 relations, but then the question is – maybe they should have been modeled as one fact table to begin with.
Can we connect two fact tables?
The fact tables have different grains (if they have the same grain they should be merged). If there are 2 fact tables, it is possible that fact table 1 has 1 row but fact table 2 has 2 rows. The fact tables need to have a fact key column, which is a unique row identifier.
How do you connect a fact table to a dimension table?
Each dimensional table needs to include a primary key that corresponds to a foreign key in the fact table. The fact table should have a primary (composite) key that is a combination of the foreign keys.
Can we have two fact tables in a star schema?
Although the diagram in this chapter shows a single fact table, a star schema can have multiple fact tables. A more complex schema with multiple fact tables is useful when you need to keep separate sets of measurements that share a common set of dimension tables.
Can we join two fact tables directly 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.
Can two dimensional tables join?
Apart from this , theoratically we can join any two dimension tables when there is 1 : 1 or 1:n join between them, only when there is n:n joins then you should be careful . you can add customer key and customerid in the address dimension table.
Can we join two fact tables in Obiee?
Is fact table normalized or denormalized?
A fact table is always DENORMALISED table. It consists of data from dimension table (Primary Key’s) and Fact table has Foreign keys and measures.
What to do when Obiee fact tables do not join to all dimension tables?
Since Fact1 does not join to Dim X, nulls are the correct answer. Looking at the SQL generated gives you an idea of how OBIEE navigates this query.
Can fact table have primary key?
No! Primary keys don’t belong in fact tables. They are practically useless since indexing them does not add any benefit and will add unwanted size to your fact table. Instead, use composite keys.. a unique combination of foreign keys from your dimension tables.
Does fact table have surrogate key?
Surrogate keys are present in dimension tables as the primary key and in fact tables as foreign keys to dimensions. However, the dimension record retains the business key as an alternate-key attribute. Surrogate keys are four-byte integers and their size does not change even when production key changes in size.