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Sanjay Gupta
Oracle, SQL, PL/SQL, D/W, MDM, informatica, data modeling, dimensional modeling, data marts, ETL, db architecture, attitude, failure
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Sanjay Gupta: WID (warehouse_id) in OBIEE
Sanjay Gupta WID (warehouse_id) in OBIEE Let me give the understanding on working of WID (warehouse_id) in dimension, fact relationship as this concept is very important to understand and clarity ...
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Sanjay Gupta: chained (and migrated) rows
chained (and migrated) rows A chained row is a row that is too large to fit into a single database data block. For example, if you use a 4KB blocksize for your database, and you need to insert a row...
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Sanjay Gupta: complex join in OBIEE
What is a complex join in OBIEE? A Complex Join in used in the Business Model & Mapping Layer (BMM layer) in the repository. Logical tables in a BMM layer can have multiple logical tables sources (LT...
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Sanjay Gupta: Dimensional Modeling - Schemas
Snow flake: can have more number of joins. Star Schema: has data redundancy, so the query performance is good. Snow flake: is normalized, so does not has data redundancy, can have performance issues...
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Sanjay Gupta: Normalization
Normalization Normalization is simply breaking down tables to achieve efficiency in retrieving and maintaining data. The most common reason is to avoid redundancy which means less storage is required...